Impaired Lakes in Minnesota

1,522 of 2,252 graded Minnesota lakes (68%) are officially listed as impaired under Clean Water Act §303(d) in the most recent EPA ATTAINS reporting cycle. 1,187 have an approved TMDL restoration plan.

Top Causes of Impairment in Minnesota

1,158

Mercury

499

Nutrients (phosphorus, nitrogen)

157

Impaired biota (cause unknown)

Salinity / chlorides

PFAS

PCBs

Turbidity

Pesticides

All 1,522 EPA-Listed Impaired Lakes in Minnesota

Lake	County	Grade	Causes	TMDL
East Fox Lake	Crow Wing	A	Mercury	✓
Deep Portage Lake	Cass	A	Mercury	✓
Clearwater Lake	Cook	A	Mercury	✓
Lower Hay Lake	Crow Wing	A	Mercury	—
Latoka Lake	Douglas	A	Mercury	✓
Pelican Lake	Otter Tail	A	Mercury	✓
Birch Lake	Wright	A	Mercury	✓
Birch Lake	Cook	A	Mercury	✓
Birch Lake	Unknown	A	Mercury	✓
Round Lake	Aitkin	A	Mercury	✓
Round Lake	Cook	A	Mercury	✓
Pike Lake	Cook	A	Mercury	✓
Pike Lake	St. Louis	A	Mercury	✓
Whitefish Lake	Crow Wing	A	Mercury	✓
Long Lake	Beltrami	A	Mercury	✓
Long Lake	Becker	A	Mercury	—
Long Lake	Itasca	A	Mercury	—
Dead Lake	Hubbard	A	Impaired biota (cause unknown)	—
Unnamed Lake	Otter Tail	A	Mercury	✓
Maple Lake	Itasca	A	Mercury	✓
West Twin Lake	Crow Wing	A	Mercury	✓
Shallow Lake	Itasca	A	Mercury	✓
Trout Lake	Itasca	A	Mercury, Salinity / chlorides	✓
Trout Lake	Itasca	A	Mercury	✓
Trout Lake	Cook	A	Mercury	✓
Chippewa Lake	Douglas	A	Mercury	✓
Otter Lake	Otter Tail	A	Nutrients (phosphorus, nitrogen)	✓
Cowdry Lake	Douglas	A	Mercury	✓
Ossawinnamakee Lake	Crow Wing	A	Mercury	—
Clear Lake	Crow Wing	A	Mercury	—
Clear Lake	Aitkin	A	Mercury	✓
Blue Lake	Hubbard	A	Mercury	—
Eagle Lake	Otter Tail	A	Mercury	—
West Fox Lake	Crow Wing	A	Mercury	✓
Ida Lake	Douglas	A	Mercury	✓
Star Lake	Crow Wing	A	Mercury	✓
Star Lake	Otter Tail	A	Mercury	✓
Upper Maple Lake	Wright	A	Mercury	—
Fish Lake	Otter Tail	A	Mercury	✓
Sand Lake	Cass	A	Mercury	✓
Roger Lake	Crow Wing	A	Mercury, Nutrients (phosphorus, nitrogen)	✓
Square Lake	Washington	A	Mercury	✓
Tofte Lake	Lake	A	Mercury	✓
Andrusia Lake	Beltrami	A	Mercury	✓
Girl Lake	Cass	A	Mercury	✓
Charlotte Lake	Wright	A	Mercury	—
Big Mcdonald Lake	Otter Tail	A	Impaired biota (cause unknown), Mercury	✓
Bass Lake	Otter Tail	A	Mercury	✓
Bass Lake	Crow Wing	A	Mercury	—
Bass Lake	Itasca	A	Mercury	✓
Island Lake	Cass	A	Nutrients (phosphorus, nitrogen)	—
Island Lake	Crow Wing	A	Mercury	—
Island Lake	Cass	A	Mercury	✓
Island Lake	Hubbard	A	Mercury	✓
Crooked Lake	Hubbard	A	Impaired biota (cause unknown)	—
Crooked Lake	Crow Wing	A	Mercury	—
Portage Lake	Cass	A	Mercury	—
Cedar Lake	Morrison	A	Mercury	✓
Big Pine Lake	Aitkin	A	Mercury	—
Lizzie Lake	Otter Tail	A	Mercury	—
Eagles Nest Lake	St. Louis	A	Mercury	✓
Turtle Lake	Itasca	A	Mercury	✓
Lower Bottle Lake	Hubbard	A	Mercury	✓
Mukooda Lake	St. Louis	A	Mercury	✓
Pokegama Lake	Itasca	A	Mercury	✓
Pickerel Lake	Becker	A	Mercury	✓
Alexander Lake	Morrison	A	Mercury	✓
George Lake	Kandiyohi	A	Mercury	✓
Middle Cormorant Lake	Becker	A	Impaired biota (cause unknown)	—
Gull Lake	Cook	A	Mercury	—
Upper Bottle Lake	Hubbard	A	Mercury	✓
Hand Lake	Cass	A	Mercury	✓
Ox Yoke Lake	Cass	A	Mercury	✓
Ottertrack Lake	Unknown	A	Mercury	—
Miltona Lake	Douglas	A	Mercury	✓
Silver Lake	St. Louis	A	Mercury	✓
Silver Lake	Crow Wing	A	Mercury	✓
Caribou Lake	Itasca	A	Mercury	✓
West Battle Lake	Otter Tail	A	Mercury	✓
Wabana Lake	Itasca	A	Mercury	✓
Little Mantrap Lake	Hubbard	A	Mercury	—
Kimball Lake	Crow Wing	A	Mercury	—
Ox Lake	Crow Wing	A	Mercury	—
Crystal Lake	Cass	A	Mercury	✓
Hatch Lake	Itasca	A	Mercury	✓
West Sylvia Lake	Wright	A	Mercury	✓
Serpent Lake	Crow Wing	A	Mercury	✓
North Twin Lake	Beltrami	A	Mercury	✓
Stuart Lake	Otter Tail	A	Mercury	—
Mina Lake	Douglas	A	Mercury	—
North Star Lake	Itasca	A	Mercury	—
Little Bass Lake	Beltrami	A	Mercury	✓
Little Bass Lake	Itasca	A	Mercury	✓
Pulaski Lake	Wright	A	Impaired biota (cause unknown), Mercury	✓
Little Mcdonald Lake	Otter Tail	A	Impaired biota (cause unknown), Mercury	✓
Knife Lake	Lake	A	Mercury	✓
Bay Lake	Crow Wing	A	Mercury	✓
Webb Lake	Cass	A	Mercury	✓
Little Hubert Lake	Crow Wing	A	Mercury	✓
Big Trout Lake	Crow Wing	A	Mercury	✓
Big Watab Lake	Stearns	A	Mercury	✓
White Bear Lake	Washington	A	Mercury	✓
Little Trout Lake	Itasca	A	Mercury	✓
East Twin Lake	Crow Wing	A	Mercury	✓
11 Crow Wing Lake	Hubbard	A	Mercury	✓
Rush Lake	Crow Wing	A	Mercury	—
Emma Lake	Hubbard	A	Mercury	✓
Hanson Lake	Lake	A	Mercury	—
Bluewater Lake	Itasca	A	Mercury	✓
Perch Lake	Crow Wing	A	Mercury	—
Kreighle Lake	Stearns	A	Mercury	✓
Thunder Lake	Cass	A	Mercury	✓
Sanburn Lake	Cass	A	Mercury	✓
Little Portage Lake	Cass	A	Mercury	✓
Hungry Jack Lake	Cook	A	Mercury	✓
Scalp Lake	Otter Tail	A	Mercury	✓
Pine Lake	Morrison	A	Mercury	✓
Pine Lake	Cook	A	Mercury	✓
Little Armstrong Lake	St. Louis	A	Mercury	✓
West Silent Lake	Otter Tail	A	Impaired biota (cause unknown), Mercury	—
Spider (Ne Lake	Hubbard	A	Mercury	✓
Gilmore Lake	Hubbard	A	Mercury	—
Little Long Lake	Itasca	A	Mercury	✓
Little Long Lake	St. Louis	A	Mercury	✓
Big Cormorant Lake	Becker	A	Mercury	✓
Owl Lake	Hubbard	A	Mercury, Nutrients (phosphorus, nitrogen)	✓
Cross Lk Reservoir	Crow Wing	A	Mercury	✓
Rose Lake	Otter Tail	A	Mercury	✓
Rose Lake	St. Louis	A	Mercury	✓
Three Island Lake	Itasca	A	Mercury	—
Pig Lake	Crow Wing	A	Mercury	—
Ten Mile Lake	Cass	A	Mercury	—
Maud Lake	Becker	A	Mercury	—
Sturgeon Lake	Pine	A	Mercury	✓
Sybil Lake	Otter Tail	A	Mercury	✓
Leo Lake	Cook	A	Mercury	✓
Duncan Lake	Cook	A	Mercury	✓
Boot Lake	Becker	A	Mercury	✓
Boot Lake	Lake	A	Mercury	✓
Little Pelican Lake	Crow Wing	A	Mercury	—
Lone Lake	Aitkin	A	Mercury	✓
Big Sand Lake	Hubbard	A	Mercury	✓
Burntside Lake	St. Louis	A	Mercury	—
Mirror Lake	Itasca	A	Mercury	✓
East Sylvia Lake	Wright	A	Mercury	✓
Ahsub Lake	Lake	A	Mercury	✓
Little Sand Lake	Hubbard	A	Mercury	—
Little Round Lake	Crow Wing	A	Mercury	—
Beauty Lake	Hubbard	A	Mercury	—
Whiskey Lake	Douglas	A	Mercury	✓
Mayhew Lake	Cook	A	Mercury	✓
Clamshell Lake	Crow Wing	A	Mercury	✓
Little Star Lake	Crow Wing	A	Mercury	✓
Moon Lake	Douglas	A	Mercury	✓
Armstrong Lake	St. Louis	A	Mercury	✓
Loon Lake	Cook	A	Mercury	—
Sylvan Lake	Cass	A	Mercury	✓
Big Bass Lake	Hubbard	A	Mercury	✓
Hunter Lake	Cass	A	Mercury	✓
Sugar Lake	Wright	A	Mercury	✓
Sugar Lake	Aitkin	A	Mercury	—
Big Fish Lake	Stearns	A	Mercury	✓
Dumbbell Lake	Lake	A	Mercury	✓
Lost Lake	Cass	A	Mercury	✓
Lost Lake	St. Louis	A	Mercury	✓
Kerbs Lake	Otter Tail	A	Impaired biota (cause unknown), Mercury	✓
Missionary Lake	Lake	A	Mercury	✓
Stony Lake	Cass	A	Mercury	✓
Stony Lake	Douglas	A	Mercury	✓
Kekekabic Lake	Lake	A	Mercury	—
St. Marys Lake	St. Louis	A	Mercury	✓
Deep Lake	St. Louis	A	Mercury	✓
Bad Axe Lake	Hubbard	A	Mercury	✓
Sagatagan Lake	Stearns	A	Mercury	✓
Ojibway Lake	Hubbard	A	Mercury	✓
Sabin Lake	St. Louis	A	Mercury	—
Widow Lake	Cass	A	Mercury	✓
Gunflint Lake	Cook	A	Mercury	✓
Swenson Lake	Beltrami	A	Mercury	✓
St. Mary'S Lake	St. Louis	A	Mercury	✓
Six Lake	Otter Tail	A	Impaired biota (cause unknown)	—
Lottie Lake	Douglas	A	Mercury	✓
Bertha Lake	Crow Wing	A	Mercury	—
Ely Lake	St. Louis	A	Mercury	✓
Edward Lake	Crow Wing	A	Mercury	✓
Kemo Lake	Cook	A	Mercury	✓
Flour Lake	Cook	A	Mercury	✓
Moses Lake	Douglas	A	Mercury	—
South Twin Lake	Beltrami	A	Mercury	✓
Carlos Lake	Douglas	A	Mercury	—
Jewett Lake	Otter Tail	A	Impaired biota (cause unknown), Mercury	✓
Ahmakose Lake	Lake	A	Mercury	✓
Belle Taine Lake	Hubbard	A	Mercury	✓
Mule Lake	Cass	A	Mercury	✓
Little Webb Lake	Cass	A	Mercury	✓
Lower Cullen Lake	Crow Wing	A	Mercury	✓
Long Lost Lake	Clearwater	A	Mercury	✓
Fawn Lake	Cass	A	Mercury	✓
Vera Lake	Lake	A	Mercury	✓
Edna Lake	Crow Wing	A	Mercury	✓
Ruth Lake	Crow Wing	A	Mercury	✓
Cherry Lake	Lake	A	Mercury	—
Ester Lake	Lake	A	Mercury	✓
Cruiser Lake	St. Louis	A	Mercury	✓
Cooper Lake	Cass	A	Mercury	✓
Bearskin Lake	Cook	A	Mercury	✓
Big Carnelian Lake	Washington	A	Mercury	✓
Kek Lake	Lake	A	Mercury	—
Topaz Lake	Lake	A	Mercury	—
Long Lake	Becker	A	Mercury	—
Gijikiki Lake	Lake	A	Mercury	—
Thunder Lake	Cass	A	Mercury	✓
Canoe Lake	Cook	A	Mercury	✓
Amoeber Lake	Lake	A	Mercury	—
Stoney Lake	Douglas	A	Mercury	✓
Grass Lake	Ramsey	A	Mercury	✓
Mckeown Lake	Cass	A	Mercury	✓
Waboose Lake	Hubbard	A	Mercury	✓
Larson Lake	Itasca	A	Mercury	✓
Lower Hay Lake	Crow Wing	A	Mercury	—
Pokegama Lake	Itasca	A	Mercury	✓
Mcfarland Lake	Cook	A	Mercury	✓
Krenz Lake	Scott	A	Mercury	✓
Hubert Lake	Crow Wing	A	Mercury	✓
Whitewater Lake	St. Louis	A	Mercury	✓
Little Carnelian Lake	Washington	A	Mercury	✓
North Union Lake	Douglas	A	Mercury	✓
Parent Lake	Lake	A	Mercury	✓
Kid Lake	Cass	A	Mercury	✓
Sturgeon Lake	Pine	A	Mercury	✓
16-0023-00 Lake	Cook	A	Mercury	✓
Little Gunflint Lake	Cook	A	Mercury	✓
Buzzle Lake	Beltrami	A	Nutrients (phosphorus, nitrogen)	✓
Mons Lake	Todd	A	Mercury	✓
Big Lake	Sherburne	A	Impaired biota (cause unknown), Mercury	✓
Kabekona Bay Lake	Cass	A	Mercury	✓
Rog Lake	Cook	A	Mercury	—
Jane Lake	Washington	A	Impaired biota (cause unknown), Mercury	✓
Pine Mountain Lake	Cass	A	Mercury	✓
Big Deep Lake	Cass	A	Mercury	✓
Mountain Lake	Unknown	A	Mercury	—
Little Jay Gould Lake	Itasca	A	Mercury	—
Hen Lake	Crow Wing	A	Mercury	—
West Mcdonald Lake	Otter Tail	A	Impaired biota (cause unknown), Mercury	✓
West Pike Lake	Cook	A	Mercury	✓
Chase Lake	Itasca	A	Mercury	✓
Little Sandy Lake	St. Louis	A	Salinity / chlorides	—
Cramer Lake	Lake	A	Mercury	—
Holland Lake	Dakota	A	Nutrients (phosphorus, nitrogen)	✓
Lower Birch Lake	Isanti	A	Nutrients (phosphorus, nitrogen)	—
Steamboat Lake	Cass	A	Mercury	—
Joe Martin Lake	St. Louis	A	Mercury	—
Boxell Lake	Cass	A	Mercury	✓
East Hunter Lake	Sherburne	A	Nutrients (phosphorus, nitrogen)	✓
Clearwater Lake	Crow Wing	A	Mercury	✓
Clearwater Lake	Clearwater	A	Mercury	✓
Little Birch Lake	Todd	A	Mercury	✓
North Long Lake	Crow Wing	A	Mercury	✓
Big Lake	Sherburne	A	Impaired biota (cause unknown), Mercury	✓
Pelican Lake	Crow Wing	A	Mercury	✓
Round Lake	Aitkin	A	Mercury	✓
Round Lake	Crow Wing	A	Mercury	✓
Ada Lake	Cass	A	Mercury	✓
Horseshoe Lake	Crow Wing	A	Mercury	✓
Washburn Lake	Cass	A	Mercury	✓
Long Lake	Kandiyohi	A	Mercury	✓
Long Lake	Otter Tail	A	Mercury	✓
Long Lake	Hubbard	A	Mercury	✓
Long Lake	Beltrami	A	Nutrients (phosphorus, nitrogen)	✓
Long Lake	Otter Tail	A	Mercury	—
Maple Lake	Douglas	A	Mercury	✓
West Twin Lake	Crow Wing	A	Mercury	✓
Detroit Lake	Becker	A	Mercury	✓
Deer Lake	Beltrami	A	Mercury	✓
Deer Lake	Itasca	A	Mercury	✓
Big Spunk Lake	Stearns	A	Mercury	—
Spectacle Lake	Isanti	A	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen) +1 more	✓
Marion Lake	Otter Tail	A	Mercury	✓
Sullivan Lake	Morrison	A	Mercury	✓
Eagle Lake	Hubbard	A	Mercury	✓
Darling Lake	Douglas	A	Mercury	✓
Mantrap Lake	Hubbard	A	Mercury	✓
Ida Lake	Wright	A	Mercury	✓
Fish Lake	Le Sueur	A	Nutrients (phosphorus, nitrogen)	✓
Benedict Lake	Hubbard	A	Mercury	—
Union Lake	Polk	A	Mercury	✓
Green Lake	Kandiyohi	A	Mercury, Salinity / chlorides	✓
Grace Lake	Beltrami	A	Mercury	✓
Bass Lake	Crow Wing	A	Nutrients (phosphorus, nitrogen)	✓
Island Lake	Hubbard	A	Mercury	✓
Moose Lake	Wright	A	Mercury	✓
Moose Lake	Beltrami	A	Mercury	—
Rainy Lake	Cass	A	Mercury	✓
Portage Lake	Crow Wing	A	Mercury	✓
Cedar Lake	Aitkin	A	Mercury	✓
Cedar Lake	Wright	A	Mercury	✓
East Loon Lake	Otter Tail	A	Mercury	—
Mitchell Lake	Sherburne	A	Impaired biota (cause unknown), Mercury	✓
Pickerel Lake	Itasca	A	Mercury	✓
Pickerel Lake	Hubbard	A	Mercury	✓
Pickerel Lake	Otter Tail	A	Mercury	✓
George Lake	Hubbard	A	Mercury	✓
Gull Lake	Cass	A	Mercury	✓
Henderson Lake	Kandiyohi	A	Mercury	✓
Upper Birch Lake	Isanti	A	Nutrients (phosphorus, nitrogen)	—
Lawrence Lake	Cass	A	Mercury	—
Child Lake	Cass	A	Mercury	✓
Clitherall Lake	Otter Tail	A	Mercury	✓
Baby Lake	Cass	A	Mercury	✓
Inguadona Lake	Cass	A	Mercury	✓
Swan Lake	Otter Tail	A	Mercury	✓
Swan Lake	Itasca	A	Mercury	✓
Big Marine Lake	Washington	A	Mercury	✓
Pleasant Lake	St. Louis	A	Mercury	✓
Blanche Lake	Otter Tail	A	Mercury	✓
Trowbridge Lake	Otter Tail	A	Mercury	✓
Poplar Lake	Cook	A	Mercury	✓
Roosevelt Lake	Cass	A	Mercury	—
Rabbit Lake	Crow Wing	A	Mercury	✓
Linka Lake	Pope	A	Mercury, Nutrients (phosphorus, nitrogen)	✓
Elk Lake	Clearwater	A	Mercury	✓
Little Trout Lake	St. Louis	A	Mercury	✓
Broadwater Bay Lake	Cass	A	Mercury	✓
Blackwater Lake	Cass	A	Mercury	✓
Balm Lake	Beltrami	A	Mercury	✓
Floyd Lake	Becker	A	Mercury	✓
Man Lake	Cass	A	Mercury	✓
Ember Lake	Wright	A	Nutrients (phosphorus, nitrogen)	✓
Little Boy Lake	Cass	A	Mercury	✓
Potato Lake	Hubbard	A	Mercury	✓
Gilbert Lake	Crow Wing	A	Mercury	✓
East Battle Lake	Otter Tail	A	Mercury	✓
Melissa Lake	Becker	A	Mercury	—
Perch Lake	St. Louis	A	Mercury	—
Shamineau Lake	Morrison	A	Mercury	✓
Side Lake	St. Louis	A	Mercury	✓
Middle Whipple Lake	Crow Wing	A	Impaired biota (cause unknown)	—
Pine Lake	Crow Wing	A	Mercury	✓
Duck Lake	Hubbard	A	Mercury	✓
Midge Lake	Hubbard	A	Mercury	✓
Little Long Lake	Hennepin	A	Mercury	✓
Stump Lake	Beltrami	A	Mercury	✓
Three Island Lake	Beltrami	A	Mercury	—
White Lake	St. Louis	A	Mercury	—
Beltrami Lake	Beltrami	A	Mercury	✓
Sturgeon Lake	St. Louis	A	Mercury	✓
Gladstone Lake	Crow Wing	A	Mercury	✓
Otter Tail Lake	Otter Tail	A	Mercury	✓
Wabedo Lake	Cass	A	Mercury	✓
Andrew Lake	Douglas	A	Mercury	✓
Trillium Lake	Cass	A	Mercury	✓
Piersons Lake	Carver	A	Nutrients (phosphorus, nitrogen)	✓
Beatrice Lake	Itasca	A	Mercury	✓
Sea Gull Lake	Cook	A	Mercury	—
Fox Lake	Becker	A	Mercury	✓
Fox Lake	Beltrami	A	Mercury	✓
Loon Lake	Cass	A	Mercury	✓
Bello Lake	Itasca	A	Mercury	✓
Big Bass Lake	Beltrami	A	Mercury	✓
Sugar Lake	Cass	A	Mercury	✓
Dodo Lake	St. Louis	A	Mercury	✓
Franklin Lake	Otter Tail	A	Mercury	—
Nisswa Lake	Crow Wing	A	Mercury	✓
Movil Lake	Beltrami	A	Mercury	✓
Johnson Lake	Pine	A	Mercury	✓
Minnie-Belle Lake	Meeker	A	Mercury	✓
Pebble Lake	Otter Tail	A	Mercury	✓
Kabekona Lake	Hubbard	A	Mercury	—
Eunice Lake	Becker	A	Mercury	—
Meadow Lake	Becker	A	Mercury	—
Signalness Lake	Pope	A	Mercury	✓
Fish Hook Lake	Hubbard	A	Mercury	✓
Boulder Lake	Hubbard	A	Mercury	✓
Clark Lake	Crow Wing	A	Mercury	✓
Two Island Lake	Cook	A	Mercury	✓
Brophy Lake	Douglas	A	Mercury	—
Leek Lake	Otter Tail	A	Mercury	✓
Burgen Lake	Douglas	A	Mercury	✓
Cadotte Lake	St. Louis	A	Mercury	✓
Hanks Lake	Crow Wing	A	Mercury	—
Pine Mountain Lake	Cass	A	Mercury	✓
Tenth Crow Wing Lake	Hubbard	A	Mercury	✓
Paul Lake	Otter Tail	A	Impaired biota (cause unknown)	—
South Oscar Lake	Douglas	A	Mercury	✓
White Sand Lake	Crow Wing	A	Impaired biota (cause unknown)	—
Cottage Lake	Becker	A	Mercury	—
Netta Lake	Anoka	A	Mercury	✓
Coon-Sandwick Lake	Itasca	A	Mercury	—
Bear Head Lake	St. Louis	A	Mercury	✓
Louise Lake	Douglas	A	Mercury	✓
Sandwick Lake	Itasca	A	Mercury	—
Young Lake	Crow Wing	A	Mercury	✓
Saganaga Lake	Cook	A	Mercury	✓
Greenwood Lake	Cook	A	Mercury	✓
Blackwell Lake	Douglas	A	Nutrients (phosphorus, nitrogen)	✓
Gogebic Lake	Cook	A	Mercury	✓
Triangle Lake	Lake	A	Mercury	✓
Alder Lake	Cook	A	Mercury	✓
Lind Lake	Becker	A	Mercury	—
Hennepin Lake	Hubbard	A	Mercury	✓
Wilson Lake	Lake	A	Mercury	✓
Big Lake	Carlton	B		—
Fish Lake	Chisago	B	Mercury	✓
East Twin Lake	Anoka	B	Mercury	✓
O'Brien Lake	Dakota	B	Nutrients (phosphorus, nitrogen)	✓
Third Lake	Carlton	B	Mercury	—
Blooms Lake	Chisago	B	Nutrients (phosphorus, nitrogen)	✓
Pat Martin Lake	Carlton	B	Mercury	—
North Lindstrom Lake	Chisago	B	Impaired biota (cause unknown)	—
Sunrise Lake	Chisago	B	Mercury	✓
Quill Lake	St. Louis	B	Mercury	✓
Loiten Lake	St. Louis	B	Mercury	—
O'Leary Lake	St. Louis	B	Mercury	✓
Beast Lake	St. Louis	B	Mercury	—
Lobster Lake	Douglas	B	Mercury	✓
Clearwater Lake	Wright	B	Mercury, Salinity / chlorides	—
Big Birch Lake	Todd	B	Mercury	✓
Mud Lake	Becker	B	Mercury	✓
Pelican Lake	Stearns	B	Mercury	✓
Round Lake	Aitkin	B	Mercury	✓
Horseshoe Lake	Isanti	B	Nutrients (phosphorus, nitrogen)	—
Horseshoe Lake	Itasca	B	Mercury	✓
Cotton Lake	Becker	B	Mercury	✓
Long Lake	Todd	B	Mercury	—
Long Lake	Todd	B	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Long Lake	Aitkin	B	Mercury	—
Long Lake	Stearns	B	Mercury	✓
Unnamed Lake	St. Louis	B	Mercury	✓
Unnamed Lake	Itasca	B	Mercury	✓
West Twin Lake	Cook	B	Mercury	✓
Jordan Lake	Lake	B	Mercury	✓
Sallie Lake	Becker	B	Mercury	✓
Deer Lake	Otter Tail	B	Mercury	—
Deer Lake	Itasca	B	Mercury	✓
Fraser Lake	Lake	B	Mercury	✓
Otter Lake	Stearns	B	Mercury, Salinity / chlorides	—
Otter Lake	Ramsey	B	Mercury	✓
Lida Lake	Otter Tail	B	Mercury	✓
Mccarron Lake	Ramsey	B	Mercury, PFAS	✓
Pirz Lake	Stearns	B	Mercury, Nutrients (phosphorus, nitrogen), Salinity / chlorides	✓
Florida Lake	Kandiyohi	B	Impaired biota (cause unknown), Mercury	✓
Clear Lake	St. Louis	B	Mercury	✓
Prairie Lake	Otter Tail	B	Mercury	✓
Eagle Lake	Crow Wing	B	Nutrients (phosphorus, nitrogen)	✓
Kenney Lake	Crow Wing	B	Mercury	✓
Ida Lake	Becker	B	Mercury	✓
Carnelian Lake	Stearns	B	Impaired biota (cause unknown)	—
Sand Lake	Pine	B	Mercury	✓
Hook Lake	Otter Tail	B	Mercury	✓
Snail Lake	Ramsey	B	Mercury	✓
Bachelor Lake	Aitkin	B	Mercury	✓
Bass Lake	Itasca	B	Mercury	✓
Island Lake	Becker	B	Mercury	✓
East Smith Lake	Itasca	B	Mercury	✓
Moose Lake	Lake	B	Mercury	✓
Moose Lake	Itasca	B	Mercury	✓
Crooked Lake	Douglas	B	Nutrients (phosphorus, nitrogen)	✓
Portage Lake	Lake	B	Mercury	✓
Portage Lake	Cook	B	Mercury	—
Ima Lake	Lake	B	Mercury	✓
Kidney Lake	Cass	B	Mercury	✓
Turtle Lake	Douglas	B	Mercury	✓
Turtle Lake	Beltrami	B	Mercury	✓
Rice Lake	Itasca	B	Mercury	✓
Thompson Lake	Sherburne	B	Impaired biota (cause unknown), Mercury	✓
Sandy Lake	St. Louis	B	Salinity / chlorides	—
Limestone Lake	Wright	B	Mercury, Nutrients (phosphorus, nitrogen)	✓
Sylvia Lake	Stearns	B	Mercury	✓
Minnewashta Lake	Carver	B	Impaired biota (cause unknown), Mercury	✓
Caribou Lake	Cook	B	Mercury	✓
Caribou Lake	St. Louis	B	Mercury	✓
East Lost Lake	Otter Tail	B	Mercury	—
Rock Lake	Crow Wing	B	Mercury, Nutrients (phosphorus, nitrogen)	✓
Middle Spunk Lake	Stearns	B	Mercury	—
Wilkins Lake	Aitkin	B	Nutrients (phosphorus, nitrogen)	✓
Two Inlets Lake	Becker	B	Mercury	✓
Jay Gould Lake	Itasca	B	Mercury	—
Crystal Lake	Otter Tail	B	Mercury	—
Mill Lake	Douglas	B	Mercury	—
Mill Lake	Becker	B	Mercury	—
North Twin Lake	Itasca	B	Salinity / chlorides	—
Mary Lake	Douglas	B	Mercury	✓
Upper Mission Lake	Crow Wing	B	Mercury	✓
Devil Track Lake	Cook	B	Mercury	✓
Pleasant Lake	Wright	B	Mercury	✓
Pleasant Lake	Stearns	B	Impaired biota (cause unknown)	—
Fourteen Lake	St. Louis	B	Mercury	✓
Esther Lake	Cook	B	Mercury	✓
Helen Lake	Itasca	B	Mercury	✓
Brown Lake	St. Louis	B	Mercury	—
Rabbit Lake	Lake	B	Mercury	—
Red Rock Lake	Cook	B	Mercury	✓
Deer Yard Lake	Cook	B	Mercury	✓
Thomas Lake	Lake	B	Mercury	✓
Elk Lake	Grant	B	Nutrients (phosphorus, nitrogen)	—
Zumbra-Sunny Lake	Carver	B	Impaired biota (cause unknown), Mercury	✓
Irene Lake	Douglas	B	Mercury	✓
Rush Lake	Pine	B	Mercury	✓
Wolf Lake	Beltrami	B	Mercury	✓
Two Rivers Lake	Stearns	B	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Schultz Lake	Dakota	B	Nutrients (phosphorus, nitrogen)	✓
East Bearskin Lake	Cook	B	Mercury	✓
Ninth Crow Wing Lake	Hubbard	B	Mercury, Nutrients (phosphorus, nitrogen)	✓
Ethel Lake	Otter Tail	B	Mercury	✓
Le Homme Dieu Lake	Douglas	B	Mercury	✓
Hammal Lake	Aitkin	B	Mercury	✓
Thirteen Lake	St. Louis	B	Mercury	✓
Sucker Lake	Lake	B	Mercury	—
Pine Lake	Clearwater	B	Mercury	✓
Pine Lake	St. Louis	B	Mercury	✓
Duck Lake	Crow Wing	B	Mercury	✓
Lac Lavon Lake	Dakota	B	Mercury	✓
Big Carnelian Lake	Washington	B	Mercury	✓
Trestle Lake	Itasca	B	Mercury	—
Disappointment Lake	Lake	B	Mercury	✓
Owl Lake	Cook	B	Mercury	✓
Ham Lake	Hubbard	B	Mercury	✓
Victoria Lake	Douglas	B	Mercury	✓
Ten Mile Lake	Otter Tail	B	Mercury	✓
Tom Lake	Cook	B	Mercury	✓
Geneva Lake	Douglas	B	Mercury	✓
Tait Lake	Cook	B	Mercury	✓
Spoon Lake	Lake	B	Mercury	✓
Julia Lake	Beltrami	B	Mercury	✓
South Turtle Lake	Otter Tail	B	Impaired biota (cause unknown), Mercury	—
Stocking Lake	Hubbard	B	Mercury	✓
Upper Hay Lake	Crow Wing	B	Mercury	✓
Buck Lake	Itasca	B	Mercury	✓
Fox Lake	Itasca	B	Mercury	—
Riley Lake	Hennepin	B	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Minnewaska Lake	Pope	B	Impaired biota (cause unknown), Mercury	✓
Manuella Lake	Meeker	B	Mercury, Salinity / chlorides	—
Loon Lake	Itasca	B	Mercury	✓
Loon Lake	St. Louis	B	Mercury	—
Echo Lake	Carlton	B	Mercury	—
Amelia Lake	Pope	B	Mercury	✓
Farm Island Lake	Aitkin	B	Mercury	✓
Ashigan Lake	Lake	B	Mercury	✓
School Lake	Chisago	B	Nutrients (phosphorus, nitrogen)	✓
Garfield Lake	Hubbard	B	Mercury	✓
Balsam Lake	Itasca	B	Mercury	—
Ryan Lake	St. Louis	B	Mercury	—
Boy Lake	Itasca	B	Mercury	✓
Ensign Lake	Lake	B	Mercury	✓
Agate Lake	Crow Wing	B	Mercury	✓
Little Rabbit Lake	Crow Wing	B	Salinity / chlorides	—
Johnson Lake	Lake	B	Mercury	✓
White Swan Lake	Itasca	B	Mercury	✓
Buffalo Lake	Becker	B	Mercury	✓
Hoffman Lake	Isanti	B	Nutrients (phosphorus, nitrogen)	—
Spirit Lake	Aitkin	B	Mercury	✓
Tin Can Mike Lake	Lake	B	Mercury	—
Little Floyd Lake	Becker	B	Mercury	✓
Loeb Lake	Ramsey	B	Mercury, Nutrients (phosphorus, nitrogen), Salinity / chlorides	✓
Dam Lake	Aitkin	B	Mercury	✓
Horseleg Lake	Isanti	B	Nutrients (phosphorus, nitrogen)	—
Newfound Lake	Lake	B	Mercury	✓
Cantlin Lake	Sherburne	B	Nutrients (phosphorus, nitrogen)	—
Borden Lake	Crow Wing	B	Mercury	✓
Scandinavian Lake	Pope	B	Impaired biota (cause unknown), Mercury	✓
Leavitt Lake	Cass	B	Mercury	—
Chub Lake	Carlton	B	Mercury	✓
Nelson Lake	Otter Tail	B	Nutrients (phosphorus, nitrogen)	✓
Nelson Lake	Douglas	B	Mercury	✓
Ghost Lake	Itasca	B	Mercury	✓
Black Lake	Beltrami	B	Mercury	—
Lax Lake	Lake	B	Mercury	✓
South Twin Lake	Itasca	B	Salinity / chlorides	—
Found Lake	Lake	B	Mercury	✓
Palmer Lake	Hubbard	B	Mercury	✓
Boulder Lake	Lake	B	Mercury	✓
Wynne Lake	St. Louis	B	Mercury, Salinity / chlorides	—
Crookneck Lake	Morrison	B	Mercury	✓
Ogishkemuncie Lake	Lake	B	Mercury	✓
Lac Lake	Carlton	B	Mercury	—
Park Lake	Carlton	B	Mercury	✓
Sandpit Lake	Lake	B	Mercury	—
Mueller Lake	Lake	B	Mercury	✓
Locator Lake	St. Louis	B	Mercury	—
Kingfisher Lake	Lake	B	Mercury	✓
Namakan Lake	St. Louis	B	Mercury	—
Little Emily Lake	Crow Wing	B	Mercury	—
Snowbank Lake	Lake	B	Mercury	✓
Blackwater Lake	Cass	B	Mercury	✓
Ashdick Lake	Lake	B	Mercury	✓
Brule Lake	Cook	B	Mercury	✓
Pickle Lake	Lake	B	Mercury	✓
Crab Lake	St. Louis	B	Mercury	—
Jasper Lake	Cook	B	Mercury	✓
Muskrat Lake	Becker	B	Mercury	✓
Fiske Lake	Otter Tail	B	Impaired biota (cause unknown), Mercury	—
Little Hanging Horn Lake	Carlton	B	Mercury	✓
Landgren Lake	Aitkin	B	Mercury	✓
Ball Club Lake	Cook	B	Mercury	—
Inguadona Lake	Cass	B	Mercury	✓
Laddie Lake	Anoka	B	Salinity / chlorides	—
Straight Lake	Becker	B	Mercury	✓
Chester Lake	Cook	B	Mercury	✓
Fenske Lake	St. Louis	B	Mercury	—
Alpine Lake	Cook	B	Mercury	—
Agamok Lake	Lake	B	Mercury	✓
Divide Lake	Lake	B	Mercury	✓
North Grave Lake	Itasca	B	Mercury	✓
Clara Lake	Cook	B	Mercury	✓
Gerund Lake	Lake	B	Mercury	✓
Pickeral Lake	Wright	B	Mercury	✓
Mesaba Lake	Cook	B	Mercury	✓
Elmo Lake	Washington	B	Mercury, PFAS	✓
Little Vermilion Lake	St. Louis	B	Mercury	—
Lake of the Clouds	Lake	B	Mercury	—
Little Horseshoe Lake	Chisago	B	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Dunnigan Lake	Lake	B	Mercury	—
Bullhead Lake	Becker	B	Impaired biota (cause unknown), Mercury	✓
Shingobee Bay Lake	Cass	B	Mercury	✓
Alton Lake	Cook	B	Mercury	✓
Roemhildts Lake	Le Sueur	B	Mercury, Nutrients (phosphorus, nitrogen)	✓
Iverson Lake	Otter Tail	B	Mercury	✓
Tetagouche Lake	Lake	B	Mercury	✓
Ninemile Lake	Lake	B	Mercury	✓
Finger Lake	St. Louis	B	Mercury	—
Alvin Lake	Douglas	B	Mercury	✓
Neglige Lake	Lake	B	Mercury	✓
Dick Lake	Cook	B	Mercury	✓
Eugene Lake	St. Louis	B	Mercury	—
Cable Lake	Polk	B	Mercury	✓
Tarry Lake	Cook	B	Mercury	✓
Lake Mitchell	Sherburne	B	Impaired biota (cause unknown), Mercury	✓
North Branch Kawishi Lake	Lake	B	Mercury	—
Stone Lake	Carver	B	Impaired biota (cause unknown), Mercury	✓
Skull Lake	Lake	B	Mercury	✓
Little Island Lake	Itasca	B	Mercury	—
Beartrack Lake	St. Louis	B	Mercury	—
Bush Lake	Hennepin	B	Mercury	✓
Schneider Lake	Stearns	B	Nutrients (phosphorus, nitrogen)	✓
Gabimichigami Lake	Cook	B	Mercury	✓
St. Joe Lake	Carver	B	Impaired biota (cause unknown), Mercury	✓
Rivalry Lake	Lake	B	Mercury	—
Link Lake	Lake	B	Mercury	—
Stevens Lake	Cass	B	Mercury	—
North Lake	St. Louis	B	Mercury	—
Frog Lake	Lake	B	Mercury	✓
Washte Lake	Lake	B	Mercury	✓
West Hunter Lake	Sherburne	B	Nutrients (phosphorus, nitrogen)	✓
Crow River Mill Pond	Kandiyohi	B	Mercury	—
Gilbert Pit Lake	St. Louis	B	Mercury	✓
Big Wolf Lake	Hubbard	B	Mercury	✓
East Pike Lake	Cook	B	Mercury	✓
Beam Pond	Ramsey	B	Salinity / chlorides	✓
East Vadnais Lake	Ramsey	B	Mercury	✓
Erie Lake	Meeker	B	Impaired biota (cause unknown), Mercury	✓
Deans Lake	Scott	B	Nutrients (phosphorus, nitrogen)	✓
West Twin Lake	St. Louis	B	Mercury	—
South Lindstrom Lake	Chisago	B	Impaired biota (cause unknown)	—
Lost Lake	St. Louis	B	Mercury	—
Sofie Lake	Carlton	B	Mercury	—
Pimushe Lake	Beltrami	B	Mercury	✓
Ml-Garrison Lake	Aitkin	B	Mercury	✓
Mattson Lake	Chisago	B	Nutrients (phosphorus, nitrogen)	✓
Minnetonka Lake	Hennepin	B	Mercury	✓
Big Lake	Stearns	B	Mercury	—
Farm Lake	Lake	B	Mercury	—
Dead Lake	Otter Tail	B	Mercury	✓
Unnamed Lake	Dakota	B	Nutrients (phosphorus, nitrogen)	✓
Unnamed Lake	Crow Wing	B	Mercury	✓
Peary Lake	St. Louis	B	Mercury	✓
Lemay Lake	Dakota	B	Mercury	✓
Upper South Long Lake	Crow Wing	B	Mercury	✓
Garden Lake	Lake	B	Mercury	✓
Fish Lake	Hennepin	B	Impaired biota (cause unknown), Mercury	✓
Little Pine Lake	Otter Tail	B	Mercury	✓
Crooked Lake	Anoka	B	Mercury	✓
Crooked Lake	Lake	B	Mercury	✓
Big Pine Lake	Otter Tail	B	Mercury	✓
Blackhawk Lake	Dakota	B	Mercury	✓
Turtle Lake	Ramsey	B	Impaired biota (cause unknown), Mercury	✓
Rice Lake	Cook	B	Mercury	✓
White Iron Lake	Lake	B	Mercury	—
Sweeney-Twin Lake	Hennepin	B	Salinity / chlorides	✓
Arrowhead Lake	Crow Wing	B	Mercury	✓
Phalen Lake	Ramsey	B	Mercury, PFAS	✓
John Lake	Wright	B	Mercury	✓
Comfort Lake	Chisago	B	Mercury, Nutrients (phosphorus, nitrogen)	✓
Mary Lake	Wright	B	Impaired biota (cause unknown), Mercury	✓
Ann Lake	Carver	B	Mercury	✓
Calhoun Lake	Kandiyohi	B	Mercury	✓
Walker Lake	Otter Tail	B	Impaired biota (cause unknown), Mercury	✓
East Twin Lake	Cook	B	Mercury	✓
Wall Lake	Otter Tail	B	Mercury	✓
Elbow Lake	Cook	B	Mercury	✓
Red Sand Lake	Crow Wing	B	Mercury	✓
Carlson Lake	Dakota	B	Nutrients (phosphorus, nitrogen)	✓
Rush Lake	Otter Tail	B	Mercury	✓
Glawe Lake	Becker	B	Mercury	✓
South Long Lake	Crow Wing	B	Mercury	✓
Alice Lake	Hubbard	B	Nutrients (phosphorus, nitrogen)	—
Lower Trelipe Lake	Cass	B	Mercury	✓
Upper Twin Lake	Hubbard	B	Mercury	✓
Perch Lake	Crow Wing	B	Mercury	✓
Plantagenet Lake	Hubbard	B	Mercury	✓
Ek Lake	St. Louis	B	Mercury	✓
Toad Lake	Becker	B	Mercury	✓
Ham Lake	Anoka	B	Mercury	✓
Sweeney Lake	Hennepin	B	Salinity / chlorides	✓
Badger Lake	Polk	B	Nutrients (phosphorus, nitrogen)	✓
Lower Prior Lake	Scott	B	Impaired biota (cause unknown), Mercury	✓
Rachel Lake	Douglas	B	Nutrients (phosphorus, nitrogen)	✓
Kego Lake	Crow Wing	B	Nutrients (phosphorus, nitrogen)	✓
Fifth Crow Wing Lake	Hubbard	B	Mercury	✓
Little Turtle Lake	Beltrami	B	Mercury, Nutrients (phosphorus, nitrogen)	✓
Wabasso Lake	Ramsey	B	Nutrients (phosphorus, nitrogen)	—
Grand Lake	Stearns	B	Mercury	✓
Turtle River Lake	Beltrami	B	Mercury	✓
West Leaf Lake	Otter Tail	B	Mercury	✓
Boy Lake	Cass	B	Mercury	—
Hoffman Lake	Otter Tail	B	Impaired biota (cause unknown), Mercury	✓
Minerva Lake	Clearwater	B	Mercury	✓
Owasso Lake	Ramsey	B	Mercury	✓
Big Portage (E Bay Lake	Cass	B	Mercury	✓
Marquette Lake	Beltrami	B	Mercury	✓
Lomond Lake	Clearwater	B	Mercury	✓
East Leaf Lake	Otter Tail	B	Mercury	✓
Fourth Crow Wing Lake	Hubbard	B	Mercury	✓
Upper Cullen Lake	Crow Wing	B	Mercury	—
Murphy Lake	St. Louis	B	Mercury	✓
Sixth Crow Wing Lake	Hubbard	B	Mercury	✓
Dade Lake	Cass	B	Mercury	✓
Waverly Lake	Wright	B	Impaired biota (cause unknown), Mercury	✓
Big Portage (W Bay Lake	Cass	B	Mercury	✓
Shoepack Lake	St. Louis	B	Mercury	—
Kittleson Lake	Polk	B	Nutrients (phosphorus, nitrogen)	✓
Tamarac Lake	Becker	B	Mercury	✓
Smokey Hollow Lake	Crow Wing	B	Mercury	—
Peter Lake	Hennepin	B	Nutrients (phosphorus, nitrogen)	✓
Spitzer Lake	Otter Tail	B	Mercury	✓
Dead Horse Lake	Itasca	B	Mercury	✓
Ward Lake	Cook	B	Mercury	✓
Hay Lake	Crow Wing	B	Salinity / chlorides	—
Magda Lake	Hennepin	B	Nutrients (phosphorus, nitrogen)	✓
Bog Lake	Itasca	B	Mercury	✓
Ella Lake	Cook	B	Mercury	✓
Missouri Lake	Cook	B	Mercury	✓
Kelly Lake	Rice	B	Mercury, Nutrients (phosphorus, nitrogen)	✓
South Wigwam Lake	Lake	B	Mercury	—
Beaver Hut Lake	Lake	B	Mercury	—
Wanless Lake	Lake	B	Mercury	—
West Sturgeon Lake	Itasca	B	Mercury	✓
Graham Lake	Otter Tail	B	Impaired biota (cause unknown)	—
Dahler Lake	Crow Wing	B	Nutrients (phosphorus, nitrogen)	—
Munson Lake	Becker	B	Nutrients (phosphorus, nitrogen)	✓
Schoolcraft Lake	Hubbard	B	Mercury	✓
Paine Lake	Hubbard	B	Mercury	✓
Vermillion Lake	Cass	B	Mercury	—
Round Lake	Hennepin	C	Mercury	✓
Horseshoe Lake	Chisago	C	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Green Lake	Chisago	C	Impaired biota (cause unknown), Mercury	✓
George Lake	Anoka	C	Mercury	✓
Coon Lake	Anoka	C	Mercury	✓
Mcdonough Lake	Dakota	C	Nutrients (phosphorus, nitrogen)	✓
Wild Rice Lake	Carlton	C	Mercury	—
Jensen Lake	Dakota	C	Nutrients (phosphorus, nitrogen)	✓
Simian Lake	St. Louis	C	Mercury	—
Spruce Lake	Carlton	C	Mercury	—
Kroon Lake	Chisago	C	Impaired biota (cause unknown), Mercury	✓
Rice Portage Lake	Carlton	C	Mercury	—
Fannie Lake	Isanti	C	Nutrients (phosphorus, nitrogen)	✓
Namakan Lake	St. Louis	C	Mercury	—
Rainy Lake	St. Louis	C	Mercury	✓
Sand Point Lake	St. Louis	C	Mercury	—
Oslo Lake	St. Louis	C	Mercury	—
Namakan Lake	St. Louis	C	Mercury	—
Jorgens Lake	St. Louis	C	Mercury	—
War Club Lake	St. Louis	C	Mercury	—
Pelican Lake	St. Louis	C	Mercury	✓
Birch Lake	Ramsey	C	Nutrients (phosphorus, nitrogen)	—
Birch Lake	St. Louis	C	Mercury, Salinity / chlorides	—
Round Lake	Ramsey	C	Mercury, PFAS	✓
Horseshoe Lake	Cook	C	Mercury	✓
Horseshoe Lake	Lake	C	Mercury	—
Long Lake	Itasca	C	Mercury	✓
Long Lake	Meeker	C	Mercury	✓
Big Swan Lake	Todd	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Maple Lake	Wright	C	Mercury	—
Stella Lake	Meeker	C	Mercury, Salinity / chlorides	—
Chippewa Lake	Lake	C	Mercury	✓
Twin Lake	Ramsey	C	Mercury	✓
Bryant Lake	Hennepin	C	Impaired biota (cause unknown), Mercury	✓
Marion Lake	Dakota	C	Mercury	✓
Wind Lake	Lake	C	Mercury	✓
Elms Lake	Isanti	C	Nutrients (phosphorus, nitrogen)	✓
Blue Lake	Isanti	C	Nutrients (phosphorus, nitrogen)	✓
Eagle Lake	Carlton	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Eagle Lake	Kandiyohi	C	Impaired biota (cause unknown), Mercury	✓
Auburn Lake	Carver	C	Impaired biota (cause unknown)	—
Colby Lake	St. Louis	C	Mercury	—
Johanna Lake	Ramsey	C	PFAS, Salinity / chlorides	✓
Fish Lake	Dakota	C	Mercury	✓
Sand Lake	St. Louis	C	Mercury	✓
Sand Lake	Carlton	C	Mercury	✓
West Vermilion Lake	St. Louis	C	Mercury	✓
Beaver Lake	Ramsey	C	Mercury	✓
Battle Creek Lake	Washington	C	Mercury, Salinity / chlorides	✓
Union Lake	Wright	C	Mercury	✓
Island Lake	Pine	C	Mercury	✓
Island Lake	Itasca	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Rossman Lake	Becker	C	Impaired biota (cause unknown)	—
Moose Lake	Todd	C	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Crooked Lake	Lake	C	Mercury	✓
Portage Lake	Hubbard	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Carp Lake	Unknown	C	Mercury	✓
Turtle Lake	Crow Wing	C	Mercury	✓
Gull Lake	Beltrami	C	Mercury	✓
Koronis Lake	Stearns	C	Impaired biota (cause unknown), Mercury	✓
Dode Lake	Itasca	C	Mercury	✓
Devil'S Lake	Kanabec	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Lewis Lake	Kanabec	C	Mercury	—
Silver Lake	Ramsey	C	Nutrients (phosphorus, nitrogen)	—
Caribou Lake	Cook	C	Mercury	✓
Goose Lake	Chisago	C	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Rock Lake	Wright	C	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Green Prairie Fish Lake	Morrison	C	Impaired biota (cause unknown)	—
Rice Marsh Lake	Hennepin	C	Nutrients (phosphorus, nitrogen)	✓
Crystal Lake	Dakota	C	Mercury	✓
Crystal Lake	Scott	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Big Sandy Lake	Aitkin	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Mary Lake	Crow Wing	C	Mercury	✓
Jessie Lake	Itasca	C	Nutrients (phosphorus, nitrogen)	✓
Jessie Lake	Douglas	C	Nutrients (phosphorus, nitrogen)	✓
Upper Cormorant Lake	Becker	C	Impaired biota (cause unknown)	—
Gem Lake	Ramsey	C	Nutrients (phosphorus, nitrogen)	✓
Stalker Lake	Otter Tail	C	Mercury	✓
Bde Maka Ska Lake	Hennepin	C	Impaired biota (cause unknown), Mercury, PFAS	✓
Bassett Lake	St. Louis	C	Mercury	✓
Lower Mission Lake	Crow Wing	C	Nutrients (phosphorus, nitrogen)	✓
Thomas Lake	Dakota	C	Nutrients (phosphorus, nitrogen)	✓
Francis Lake	Meeker	C	Mercury	✓
Nelson Lake	Becker	C	Impaired biota (cause unknown)	—
Elbow Lake	St. Louis	C	Mercury	—
Everett Lake	St. Louis	C	Mercury	—
Wolf Lake	St. Louis	C	Mercury	—
Wolf Lake	St. Louis	C	Mercury	✓
Nokay Lake	Crow Wing	C	Mercury	✓
Basswood Lake	Lake	C	Mercury	✓
Fall Lake	Lake	C	Mercury	—
Perch Lake	Carlton	C	Mercury	—
Perch Lake	Lincoln	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Insula Lake	Lake	C	Mercury	—
Split Hand Lake	Itasca	C	Nutrients (phosphorus, nitrogen)	✓
South Center Lake	Chisago	C	Impaired biota (cause unknown), Mercury	✓
Lower Twin Lake	Wadena	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Waukenabo Lake	Aitkin	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Hadley Lake	Hennepin	C	Nutrients (phosphorus, nitrogen)	✓
Chisago Lake	Chisago	C	Mercury	✓
Mcdonald Lake	Washington	C	Nutrients (phosphorus, nitrogen)	—
Flowage Lake	St. Louis	C	Mercury	—
Cedar Island Lake	St. Louis	C	Mercury, Salinity / chlorides	—
Boot Lake	Anoka	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Sibley Lake	Crow Wing	C	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Grove Lake	Pope	C	Mercury	✓
Stocking Lake	Wadena	C	Mercury	✓
Andrew Lake	Kandiyohi	C	Impaired biota (cause unknown), Mercury	✓
Wirth Lake	Hennepin	C	Mercury, Salinity / chlorides	✓
Melon Lake	Lake	C	Mercury	✓
Black Oak Lake	Stearns	C	Nutrients (phosphorus, nitrogen)	—
Little Split Hand Lake	Itasca	C	Nutrients (phosphorus, nitrogen)	✓
Blackduck Lake	St. Louis	C	Mercury	✓
Bonnie Lake	Lake	C	Mercury	✓
Shoal Lake	Itasca	C	Mercury	✓
Waconia Lake	Carver	C	Impaired biota (cause unknown), Mercury	✓
Lizz Lake	Cook	C	Mercury	✓
Crow R Mill Pond	Kandiyohi	C	Mercury	—
Miller Lake	Carlton	C	Mercury	—
Wakefield Lake	Aitkin	C	Mercury	—
Mayo Lake	Crow Wing	C	Nutrients (phosphorus, nitrogen)	✓
Seventh Crow Wing Lake	Hubbard	C	Mercury	✓
Little Moose Lake	Itasca	C	Mercury	✓
Spring Lake	Scott	C	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Spring Lake	St. Louis	C	Mercury	✓
Horse Lake	Lake	C	Mercury	—
Frances Lake	Le Sueur	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Height of Land Lake	Becker	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Bear Island Lake	St. Louis	C	Mercury	—
Little Sturgeon Lake	St. Louis	C	Mercury	✓
Seed Lake	Unknown	C	Mercury	✓
Campbell Lake	Beltrami	C	Mercury	✓
Carrie Lake	Kandiyohi	C	Mercury	✓
Nichols Lake	St. Louis	C	Mercury	✓
Lower Spunk Lake	Stearns	C	Mercury	—
Nelson Lake	Becker	C	Impaired biota (cause unknown)	—
Nelson Lake	Pope	C	Nutrients (phosphorus, nitrogen)	✓
Black Lake	Ramsey	C	Nutrients (phosphorus, nitrogen)	✓
Augusta Lake	Stearns	C	Nutrients (phosphorus, nitrogen)	✓
Games Lake	Kandiyohi	C	Impaired biota (cause unknown), Mercury	✓
Shagawa Lake	St. Louis	C	Mercury	✓
Legion Pond	Washington	C	Nutrients (phosphorus, nitrogen)	—
German Lake	Becker	C	Mercury	✓
Flash Lake	Lake	C	Mercury	✓
Splash Lake	Lake	C	Mercury	—
Sunfish Lake	Washington	C	Nutrients (phosphorus, nitrogen)	✓
Strup Lake	Lake	C	Mercury	—
Eighth Crow Wing Lake	Hubbard	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Josephine Lake	Ramsey	C	Mercury	✓
Little Mud Lake	Meeker	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Pequaywan Lake	St. Louis	C	Mercury	✓
Deadfish Lake	Carlton	C	Mercury	—
Reno Lake	Pope	C	Impaired biota (cause unknown), Mercury	✓
Aaron Lake	Douglas	C	Mercury	—
Nest Lake	Kandiyohi	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Leora Lake	St. Louis	C	Mercury	✓
Little Saganaga Lake	Cook	C	Mercury	✓
Blackface Lake	Aitkin	C	Mercury	✓
One Lake	Lake	C	Mercury	✓
Forest Lake	Washington	C	PCBs	✓
Osakis Lake	Todd	C	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Carver Lake	Washington	C	Mercury, Salinity / chlorides	✓
Gun Lake	Aitkin	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Little Chippewa Lake	Douglas	C	Nutrients (phosphorus, nitrogen)	—
Three Lake	Lake	C	Mercury	—
Two Lake	Lake	C	Mercury	✓
Lac la Croix Lake	St. Louis	C	Mercury	—
Indian Lake	Wright	C	Nutrients (phosphorus, nitrogen)	✓
West Lost Lake	Otter Tail	C	Mercury	✓
Lily Lake	Washington	C	Mercury	✓
Lily Lake	Itasca	C	Mercury	✓
Parkers Lake	Hennepin	C	Mercury, Salinity / chlorides	✓
69-0470-00 Lake	St. Louis	C	Mercury	—
W Two Rivers Reservoir	St. Louis	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Lunar Lake	Lake	C	Mercury	—
Ace Lake	St. Louis	C	Nutrients (phosphorus, nitrogen)	—
Westwood Lake	Hennepin	C	Nutrients (phosphorus, nitrogen)	—
Gust Lake	Cook	C	Mercury	✓
Fourtown Lake	St. Louis	C	Mercury	—
Trader Lake	Lake	C	Mercury	✓
Mora Lake	Cook	C	Mercury	✓
Hay Lake	Carlton	C	Mercury	✓
Henry Lake	Douglas	C	Nutrients (phosphorus, nitrogen), Salinity / chlorides	—
Brandy Lake	Becker	C	Nutrients (phosphorus, nitrogen)	✓
Kennedy Lake	Becker	C	Mercury	✓
Phoebe Lake	Cook	C	Mercury	—
Oyster Lake	St. Louis	C	Mercury	—
Karl Lake	Cook	C	Mercury	—
69-0732-00 Lake	St. Louis	C	Mercury	—
Quill Lake	St. Louis	C	Mercury	✓
16-0569-00 Lake	Cook	C	Mercury	✓
Buchanan Lake	Otter Tail	C	Mercury	✓
Itasca Lake	Clearwater	C	Mercury	✓
Crawford Lake	Wright	C	Nutrients (phosphorus, nitrogen)	✓
South Lake	Cook	C	Mercury	✓
Bolfing Lake	Stearns	C	Nutrients (phosphorus, nitrogen)	✓
South Grave Lake	Itasca	C	Mercury	✓
Trident Lake	Lake	C	Mercury	✓
Low: Mpca Co-Located Site Four Mile Bay Lake	Lake of the Woods	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Dyers Lake	Cook	C	Mercury	✓
Rabideau Lake	Beltrami	C	Mercury	✓
Little Cormorant Lake	Becker	C	Impaired biota (cause unknown), Mercury	✓
Sawbill Lake	Cook	C	Mercury	✓
Watap Lake	Cook	C	Mercury	✓
Long Island Lake	Cook	C	Mercury	—
Potato Lake	Hubbard	C	Mercury	✓
Casey Lake	Ramsey	C	Salinity / chlorides	✓
Winkle Lake	St. Louis	C	Mercury	✓
Round Island Lake	Lake	C	Mercury	✓
Sturgeon Lake 3	Goodhue	C	Salinity / chlorides	—
Green Lake	Isanti	C	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen) +1 more	✓
Big Pine Lake	Pine	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Linwood Lake	Anoka	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Skogman Lake	Isanti	C	Nutrients (phosphorus, nitrogen)	✓
East Twin Lake	St. Louis	C	Mercury	—
Pine Lake	Aitkin	C	Nutrients (phosphorus, nitrogen)	✓
North Center Lake	Chisago	C	Impaired biota (cause unknown), Mercury	✓
Jaskari Lake	Carlton	C	Mercury	—
Bang Lake	Carlton	C	Mercury	—
Lory Lake	Isanti	C	Mercury	—
Pelican Lake	Pope	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Charley Lake	Ramsey	C	Impaired biota (cause unknown), Mercury	✓
Margaret Lake	Cass	C	Nutrients (phosphorus, nitrogen)	✓
Maple Lake	Todd	C	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Maple Lake	Polk	C	Mercury	✓
Shallow Pond	Itasca	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Medicine Lake	Hennepin	C	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
South Sturgeon Lake	St. Louis	C	Mercury	✓
Clear Lake	Washington	C	Impaired biota (cause unknown), Mercury, PFAS	✓
Sauk Lake	Stearns	C	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Johanna Lake	Pope	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Fish Lake	Jackson	C	Impaired biota (cause unknown), Mercury	✓
Fish Lake	Scott	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Washington Lake	Meeker	C	Mercury	✓
East Auburn Lake	Carver	C	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Irving Lake	Beltrami	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Bass Lake	Hennepin	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Bass Lake	Otter Tail	C	Nutrients (phosphorus, nitrogen)	✓
Island Lake	Carlton	C	Nutrients (phosphorus, nitrogen)	✓
Moose Lake	Beltrami	C	Nutrients (phosphorus, nitrogen)	—
Volney Lake	Le Sueur	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
George Lake	Cass	C	Mercury	✓
Normandale Lake	Hennepin	C	Nutrients (phosphorus, nitrogen)	✓
Silver Lake	Hennepin	C	Nutrients (phosphorus, nitrogen)	✓
Third Crow Wing Lake	Hubbard	C	Mercury	✓
Crystal Lake	Hennepin	C	Nutrients (phosphorus, nitrogen), PFAS	✓
Pleasant Lake	Ramsey	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Latimer Lake	Todd	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Strand Lake	St. Louis	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Red Rock Lake	Douglas	C	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Oak Lake	Carver	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Bavaria Lake	Carver	C	Impaired biota (cause unknown), Mercury	—
Rebecca Lake	Hennepin	C	Mercury	✓
Harriet Lake	Hennepin	C	Impaired biota (cause unknown), Mercury, PFAS	✓
Elbow Lake	St. Louis	C	Mercury, Nutrients (phosphorus, nitrogen)	—
Wolf Lake	Douglas	C	Mercury	—
South Long Lake	Ramsey	C	Mercury, Nutrients (phosphorus, nitrogen), Salinity / chlorides	✓
Villard Lake	Pope	C	Mercury	✓
Idlewild Lake	Hennepin	C	Mercury	✓
Brooks Lake	Wright	C	Nutrients (phosphorus, nitrogen)	✓
Lower Red Lake : Central	Beltrami	C	Nutrients (phosphorus, nitrogen)	—
Sucker Lake	Ramsey	C	Mercury	✓
Hyland Lake	Hennepin	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Stakke Lake	Becker	C	Nutrients (phosphorus, nitrogen)	✓
Duck Lake	Hennepin	C	Mercury	✓
Belle Lake	Meeker	C	Nutrients (phosphorus, nitrogen)	✓
Granite Lake	Wright	C	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Lotus Lake	Carver	C	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Beebe Lake	Wright	C	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Steiger Lake	Carver	C	Impaired biota (cause unknown), Mercury	—
Bald Eagle Lake	Ramsey	C	Mercury	✓
Ramsey Lake	Wright	C	Nutrients (phosphorus, nitrogen)	✓
St. Clair Lake	Becker	C	Nutrients (phosphorus, nitrogen)	✓
Upper Prior Lake	Scott	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Berger Lake	Otter Tail	C	Impaired biota (cause unknown), Mercury	✓
Somers Lake	Wright	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Blackduck Lake	Beltrami	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Lucy Lake	Carver	C	Mercury	✓
Lake of the Isles	Hennepin	C	Mercury, PFAS	✓
Hart Lake	Hubbard	C	Nutrients (phosphorus, nitrogen)	—
East Thomas Lake	Dakota	C	Nutrients (phosphorus, nitrogen)	✓
Amelia Lake	Anoka	C	Mercury	✓
Burandt Lake	Carver	C	Nutrients (phosphorus, nitrogen)	✓
Wakefield Lake	Ramsey	C	Nutrients (phosphorus, nitrogen)	✓
Golden Lake	Anoka	C	Mercury	✓
Bald Lake	Dakota	C	Mercury	✓
Ripley Lake	Meeker	C	Mercury	✓
Locke Lake	Wright	C	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Spring Lake	Meeker	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Spring Lake	Ramsey	C	Salinity / chlorides	—
Sebie Lake	Crow Wing	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Weaver Lake	Hennepin	C	Mercury	✓
Leven Lake	Pope	C	Nutrients (phosphorus, nitrogen)	✓
Susan Lake	St. Louis	C	Mercury	✓
Louisa Lake	Stearns	C	Nutrients (phosphorus, nitrogen)	✓
Schmidt Lake	Hennepin	C	Nutrients (phosphorus, nitrogen)	—
Westport Lake	Pope	C	Nutrients (phosphorus, nitrogen)	✓
Gervais Lake	Ramsey	C	Impaired biota (cause unknown), Mercury, PFAS +1 more	✓
French Lake	Wright	C	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
First Crow Wing Lake	Hubbard	C	Nutrients (phosphorus, nitrogen)	✓
King Lake	Itasca	C	Nutrients (phosphorus, nitrogen)	✓
Keller Lake	Ramsey	C	PFAS	—
Keller Lake	Dakota	C	Nutrients (phosphorus, nitrogen)	✓
Rockstad Lake	Clearwater	C	Nutrients (phosphorus, nitrogen)	✓
Mashkenode Lake	St. Louis	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Forest Lake	Hennepin	C	Nutrients (phosphorus, nitrogen)	✓
Grave Lake	Crow Wing	C	Nutrients (phosphorus, nitrogen)	—
Orwell Lake	Otter Tail	C	Mercury, Salinity / chlorides	✓
Tanners Lake	Washington	C	PFAS, Salinity / chlorides	✓
Moore Lake	Anoka	C	Nutrients (phosphorus, nitrogen)	✓
Pearl Lake	Stearns	C	Mercury, Nutrients (phosphorus, nitrogen), Salinity / chlorides	✓
Middle Lake	Kandiyohi	C	Impaired biota (cause unknown), Mercury	✓
Bartlett Lake	Koochiching	C	Nutrients (phosphorus, nitrogen)	✓
Agnes Lake	Douglas	C	Mercury, Nutrients (phosphorus, nitrogen), Salinity / chlorides	✓
La Pond	St. Louis	C	Mercury	✓
Wine Lake	Becker	C	Nutrients (phosphorus, nitrogen)	✓
Uff Lake	Polk	C	Nutrients (phosphorus, nitrogen)	✓
Jennie Lake	Meeker	C	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Heron Lake	Jackson	C	Nutrients (phosphorus, nitrogen)	✓
Dixon Lake	Itasca	C	Mercury, Nutrients (phosphorus, nitrogen)	✓
Orchard Lake	Dakota	C	Mercury	✓
Freeborn Lake	Douglas	C	Impaired biota (cause unknown)	—
Cedar Lake	Carlton	D	Mercury	—
Red Rock Lake	Hennepin	D	Mercury	✓
Swamp Lake	Chisago	D	Nutrients (phosphorus, nitrogen)	✓
Mandall Lake	Chisago	D	Nutrients (phosphorus, nitrogen)	—
Scotch Lake	Le Sueur	D	Nutrients (phosphorus, nitrogen)	✓
Kabetogama Lake	St. Louis	D	Mercury	✓
Little Shoepack Lake	St. Louis	D	Mercury	—
Rainy Lake	St. Louis	D	Mercury	—
Kabetogama Lake	St. Louis	D	Mercury	✓
Agnes Lake	St. Louis	D	Mercury	—
Sand Point Lake	St. Louis	D	Mercury	—
Quarter Line Lake	St. Louis	D	Mercury	—
Sand Point Lake	St. Louis	D	Mercury	—
Crane Lake	St. Louis	D	Mercury	—
Kabetogama Lake	St. Louis	D	Mercury	✓
Rays Lake	Le Sueur	D	Nutrients (phosphorus, nitrogen)	✓
Mud Lake	Kandiyohi	D	Mercury, Salinity / chlorides	—
Horseshoe Lake	Aitkin	D	Nutrients (phosphorus, nitrogen)	✓
Long Lake	Pine	D	Mercury	✓
Long Lake	Otter Tail	D	Nutrients (phosphorus, nitrogen)	✓
Unnamed Lake	Hennepin	D	Nutrients (phosphorus, nitrogen)	—
Unnamed Lake	Becker	D	Impaired biota (cause unknown)	—
Unnamed Lake	Polk	D	Nutrients (phosphorus, nitrogen)	✓
Unnamed Lake	Washington	D	Nutrients (phosphorus, nitrogen)	✓
Unnamed Lake	Stearns	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Cokato Lake	Wright	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
East Vermilion Lake	St. Louis	D	Mercury, Salinity / chlorides	✓
Deer Lake	Wright	D	Nutrients (phosphorus, nitrogen)	✓
Twin Lake	Hennepin	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen) +2 more	✓
Eddy Lake	Carlton	D	Mercury	✓
Lower Lawrence Lake	Itasca	D	Mercury	—
Clear Lake	Otter Tail	D	Mercury	—
One Pine Lake	St. Louis	D	Mercury	—
Prairie Lake	Itasca	D	Mercury	✓
Prairie Lake	St. Louis	D	Mercury	—
Marion Lake	McLeod	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Sullivan Lake	Wright	D	Mercury	—
Eagle Lake	Wright	D	Impaired biota (cause unknown)	—
South Farm Lake	Lake	D	Mercury	—
Curtis Lake	Yellow Medicine	D	Nutrients (phosphorus, nitrogen)	✓
Zumbro Lake	Olmsted	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Star Lake	Cook	D	Mercury	✓
Bennett Lake	Ramsey	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Fish Lake	Wright	D	Nutrients (phosphorus, nitrogen)	✓
Whaletail Lake	Hennepin	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Norway Lake	Kandiyohi	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Square Lake	Lake	D	Mercury	✓
Tamarack Lake	Carlton	D	Mercury, Nutrients (phosphorus, nitrogen)	—
Crow Wing Lake	Crow Wing	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Bass Lake	Aitkin	D	Mercury	✓
Bass Lake	St. Louis	D	Mercury, Salinity / chlorides	✓
Island Lake	Ramsey	D	Mercury	✓
Portage Lake	Aitkin	D	Nutrients (phosphorus, nitrogen)	—
Cedar Lake	Hennepin	D	Impaired biota (cause unknown), Mercury	—
Emily Lake	Ramsey	D	Mercury	✓
Emily Lake	Crow Wing	D	Nutrients (phosphorus, nitrogen)	—
Virginia Lake	Carver	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Barrett Lake	Grant	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Rice Lake	Stearns	D	Mercury, Nutrients (phosphorus, nitrogen), Salinity / chlorides	✓
Mitchell Lake	Hennepin	D	Mercury	✓
Pickerel Lake	Dakota	D	Mercury	✓
Mcguire Lake	Itasca	D	Mercury	✓
Bingham Lake	Cottonwood	D	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Del Clark Lake	Yellow Medicine	D	Mercury	✓
Peterson Lake	Otter Tail	D	Mercury	—
Blind Lake	Aitkin	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Homer Lake	Cook	D	Mercury	✓
Minnewawa Lake	Aitkin	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Sewell Lake	Otter Tail	D	Mercury	✓
Mary Lake	Wright	D	Impaired biota (cause unknown), Mercury	✓
Ann Lake	Pope	D	Nutrients (phosphorus, nitrogen)	✓
Mccoy Lake	Hennepin	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Camp Lake	Swift	D	Mercury	✓
Camp Lake	Wright	D	Nutrients (phosphorus, nitrogen)	✓
Goodners Lake	Stearns	D	Nutrients (phosphorus, nitrogen), Salinity / chlorides	✓
Diamond Lake	Kandiyohi	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
North Turtle Lake	Otter Tail	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Independence Lake	Hennepin	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Fleming Lake	Aitkin	D	Nutrients (phosphorus, nitrogen)	✓
Hanging Kettle Lake	Aitkin	D	Mercury	✓
Oak Lake	Becker	D	Nutrients (phosphorus, nitrogen)	✓
Oak Lake	Pine	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Thomas Lake	Hennepin	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Francis Lake	Isanti	D	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Crane Lake	St. Louis	D	Mercury	—
Pomme de Terre Lake	Grant	D	Mercury	✓
Onagon Lake	Cook	D	Mercury	—
Blackwater Lake	Itasca	D	Mercury	✓
Howard Lake	Wright	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Wolf Lake	Aitkin	D	Mercury, Nutrients (phosphorus, nitrogen)	—
Richardson Lake	Meeker	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Gilchrist Lake	Pope	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Smith Lake	Douglas	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Martin Lake	Anoka	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
North Brown'S Lake	Stearns	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Reeds Lake	Waseca	D	Mercury	✓
Caroline Lake	Wright	D	Nutrients (phosphorus, nitrogen)	✓
Esquagamah Lake	Aitkin	D	Mercury, Nutrients (phosphorus, nitrogen)	—
Evergreen Pnds Lake	Ramsey	D	Nutrients (phosphorus, nitrogen)	✓
East Sarah Lake	Hennepin	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Cedar Island Lake	Stearns	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
St. Olaf Lake	Waseca	D	Mercury	✓
Boot Lake	St. Louis	D	Mercury	—
Anderson Lake	Hennepin	D	Mercury	✓
Net Lake	Pine	D	Nutrients (phosphorus, nitrogen)	✓
Sarah Lake	Murray	D	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Elm Island Lake	Aitkin	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Vermilion Lake	St. Louis	D	Mercury, Salinity / chlorides	✓
Jacobs Lake	St. Louis	D	Mercury	—
Fox Lake	Pine	D	Nutrients (phosphorus, nitrogen)	✓
Loon Lake	Aitkin	D	Mercury	—
Alden Lake	St. Louis	D	Mercury	—
Ogrens Lake	Chisago	D	Nutrients (phosphorus, nitrogen)	✓
Ripple Lake	Aitkin	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Hendricks Lake	Lincoln	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
St. James Lake	Watonwan	D	Mercury	✓
Hattie Lake	Stevens	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Holly Lake	Cook	D	Mercury	—
Upper Red Lake: Central	Beltrami	D	Mercury	✓
Rabour Lake	Chisago	D	Nutrients (phosphorus, nitrogen)	—
Great Northern Lake	Stearns	D	Nutrients (phosphorus, nitrogen)	✓
Ryan Lake	Hennepin	D	Impaired biota (cause unknown), Mercury, PFAS +1 more	✓
Deep Lake	Ramsey	D	Nutrients (phosphorus, nitrogen)	✓
Moosehead Lake	Carlton	D	Mercury	—
Lower Comstock Lake	St. Louis	D	Mercury	—
O'Dowd Lake	Scott	D	Impaired biota (cause unknown), Mercury	✓
Buffalo Lake	Wright	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Gilfillan Lake	Ramsey	D	Nutrients (phosphorus, nitrogen)	✓
Shaokotan Lake	Lincoln	D	Impaired biota (cause unknown), Mercury	✓
Four Lake	Lake	D	Mercury	✓
Little Sauk Lake	Todd	D	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Third Lake	Chisago	D	Nutrients (phosphorus, nitrogen)	✓
Meadow Lake	Hennepin	D	Nutrients (phosphorus, nitrogen)	✓
Hoff Lake	Pope	D	Nutrients (phosphorus, nitrogen)	✓
Lake Jefferson	Le Sueur	D	Nutrients (phosphorus, nitrogen)	✓
Stockhaven Lake	Douglas	D	Mercury	—
Reitz Lake	Carver	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Lee Lake	Becker	D	Nutrients (phosphorus, nitrogen)	✓
Becker Lake	Stearns	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Little Cowhorn Lake	Itasca	D	Nutrients (phosphorus, nitrogen)	✓
Hatchet Lake	Lake	D	Mercury	✓
Grouse Lake	Lake	D	Mercury	—
Second Lake	Carlton	D	Mercury, Turbidity	—
Gander Lake	Lake	D	Mercury	—
Polly Lake	Lake	D	Mercury	✓
Marie Lake	Stearns	D	Nutrients (phosphorus, nitrogen)	✓
Rifle Lake	Lake	D	Mercury	✓
Isabella Lake	Lake	D	Mercury	✓
Hanging Horn Lake	Carlton	D	Mercury	—
Cottonwood Lake	Cottonwood	D	Impaired biota (cause unknown)	—
Little Spirit Lake	Jackson	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Sturgeon Lake 2	Goodhue	D	Salinity / chlorides	—
Wassermann West Lake	Carver	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Hassel Lake	Swift	D	Nutrients (phosphorus, nitrogen)	✓
Winona Lake	Winona	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Madison Lake	Blue Earth	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Papoose Lake	Lake	D	Mercury	✓
Otto Lake	St. Louis	D	Mercury	—
Little Gabbro Lake	Lake	D	Mercury	—
Lower Pauness Lake	St. Louis	D	Mercury	✓
Hub Lake	Cook	D	Mercury	✓
Lower Elk Lake	Grant	D	Nutrients (phosphorus, nitrogen)	—
Bur Oaks Pond	Dakota	D	Mercury	✓
Newton Lake	Lake	D	Mercury	✓
Gabbro Lake	Lake	D	Mercury	—
State Line Lake	Freeborn	D	Nutrients (phosphorus, nitrogen)	✓
N. Br. Kawishiwi R. Lake	Lake	D	Mercury	—
Rogers Lake	Dakota	D	Nutrients (phosphorus, nitrogen)	✓
Esquagama Lake	St. Louis	D	Mercury, Salinity / chlorides	—
Bone Lake	Washington	D	Impaired biota (cause unknown), Mercury	✓
Nibin Lake	St. Louis	D	Mercury	—
Schwappauf Lake	Hennepin	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Ban Lake	St. Louis	D	Mercury	✓
Gilstad Lake	Beltrami	D	Mercury	—
Lower George Lake	Cook	D	Mercury	—
Kawasachong Lake	Lake	D	Mercury	✓
Kawishi Lake	Lake	D	Mercury	✓
Mccormic Lake	Stearns	D	Nutrients (phosphorus, nitrogen)	✓
Twin Lake	Isanti	D	Nutrients (phosphorus, nitrogen)	—
Little Lake	Chisago	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Rush Lake	Chisago	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Gerhardt Lake	Dakota	D	Nutrients (phosphorus, nitrogen)	✓
Linn Lake	Chisago	D	Nutrients (phosphorus, nitrogen)	✓
Sturgeon Lake 1	Goodhue	D	Salinity / chlorides	—
Little Stanchfield Lake	Isanti	D	Nutrients (phosphorus, nitrogen)	—
Round Lake	Jackson	D	Nutrients (phosphorus, nitrogen)	✓
Horseshoe Lake	Stearns	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Long Lake	Kandiyohi	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Long Lake	Watonwan	D	Impaired biota (cause unknown)	—
Big Swan Lake	Meeker	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Unnamed Lake	Wright	D	Nutrients (phosphorus, nitrogen)	✓
Clear Lake	Jackson	D	Nutrients (phosphorus, nitrogen)	✓
Eagle Lake	Sherburne	D	Nutrients (phosphorus, nitrogen)	✓
Eagle Lake	Hennepin	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Star Lake	Meeker	D	Nutrients (phosphorus, nitrogen)	✓
East Solomon Lake	Kandiyohi	D	Mercury	✓
Grace Lake	Carver	D	Nutrients (phosphorus, nitrogen)	✓
Cedar Lake	Rice	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Wassermann Lake	Carver	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Sandy Lake	Anoka	D	Nutrients (phosphorus, nitrogen)	—
Arrowhead Lake	Hennepin	D	Impaired biota (cause unknown), Mercury	✓
Silver Lake	Ramsey	D	Mercury, Nutrients (phosphorus, nitrogen), Salinity / chlorides	✓
Goose Lake	Pope	D	Nutrients (phosphorus, nitrogen)	—
Fremont Lake	Sherburne	D	Nutrients (phosphorus, nitrogen)	✓
Foot Lake	Kandiyohi	D	Nutrients (phosphorus, nitrogen)	—
Ann Lake	Wright	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Ann Lake	Kanabec	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Crosby Lake	Ramsey	D	Mercury	✓
Elk Lake	Sherburne	D	Nutrients (phosphorus, nitrogen)	✓
Betty Lake	Meeker	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Briggs Lake	Sherburne	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Willmar Lake	Kandiyohi	D	Nutrients (phosphorus, nitrogen)	—
Wilkinson Lake	Ramsey	D	Nutrients (phosphorus, nitrogen)	✓
Nokomis Lake	Hennepin	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen) +1 more	✓
Martha Lake	Wright	D	Mercury	—
Half Moon Lake	Hennepin	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Big Stone Lake	Big Stone	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Julia Lake	Sherburne	D	Nutrients (phosphorus, nitrogen)	✓
Collinwood Lake	Wright	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Sarah Lake	Hennepin	D	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Fox Lake	Rice	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Scott Lake	Wright	D	Nutrients (phosphorus, nitrogen)	✓
Upper Lake	Ramsey	D	Nutrients (phosphorus, nitrogen)	✓
Susan Lake	Carver	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Guernsey Lake	Todd	D	Nutrients (phosphorus, nitrogen)	✓
Strandness Lake	Pope	D	Nutrients (phosphorus, nitrogen)	✓
Tanager Lake	Hennepin	D	Nutrients (phosphorus, nitrogen)	✓
Brownie Lake	Hennepin	D	Mercury, Salinity / chlorides	✓
German Lake	Le Sueur	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Winterhalter Lake	Hennepin	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Hilltop Pd Lake	Dakota	D	Nutrients (phosphorus, nitrogen)	✓
Big Kandiyohi Lake	Kandiyohi	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Davis Lake	Aitkin	D	Mercury	—
Swartout Lake	Wright	D	Nutrients (phosphorus, nitrogen)	✓
Stahl'S Lake	McLeod	D	Mercury	✓
Winsted Lake	McLeod	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Willie Lake	Meeker	D	Mercury, Nutrients (phosphorus, nitrogen)	✓
Washington Lake	Le Sueur	F	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Emily Lake	Chisago	F	Nutrients (phosphorus, nitrogen)	✓
Wallmark Lake	Chisago	F	Nutrients (phosphorus, nitrogen)	✓
Preston Lake	Renville	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Budd Lake	Martin	F	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen), PCBs	✓
North Long Lake	Ramsey	F	Mercury	✓
Mud Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Mud Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Mud Lake	Otter Tail	F	Mercury	✓
Mud Lake	Stearns	F	Nutrients (phosphorus, nitrogen)	✓
Snelling Lake	Hennepin	F	Mercury	✓
Pike Lake	Scott	F	Nutrients (phosphorus, nitrogen)	✓
Pike Lake	Ramsey	F	Nutrients (phosphorus, nitrogen), Salinity / chlorides	✓
Horseshoe Lake	Rice	F	Nutrients (phosphorus, nitrogen)	✓
Long Lake	Stearns	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Long Lake	Cottonwood	F	Nutrients (phosphorus, nitrogen)	✓
Long Lake	Hennepin	F	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Unnamed Lake	Ramsey	F	Nutrients (phosphorus, nitrogen)	✓
Unnamed Lake	Meeker	F	Nutrients (phosphorus, nitrogen)	✓
Unnamed Lake	Becker	F	Mercury	✓
Unnamed Lake	Douglas	F	Nutrients (phosphorus, nitrogen)	—
Unnamed Lake	Big Stone	F	Nutrients (phosphorus, nitrogen)	✓
Unnamed Lake	Swift	F	Impaired biota (cause unknown), Mercury	✓
Unnamed Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Jonathan Lake	Carver	F	Nutrients (phosphorus, nitrogen)	✓
Peltier Lake	Anoka	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Tetonka Lake	Le Sueur	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Wakanda Lake	Kandiyohi	F	Nutrients (phosphorus, nitrogen)	✓
Saint Johns Lake	Kandiyohi	F	Nutrients (phosphorus, nitrogen)	✓
Clear Lake	Meeker	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Clear Lake	Brown	F	Nutrients (phosphorus, nitrogen)	✓
Clear Lake	Waseca	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Eagle Lake	Carver	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Eagle Lake	Blue Earth	F	Nutrients (phosphorus, nitrogen)	✓
Ballantyne Lake	Blue Earth	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Fish Lake	Kanabec	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Sand Lake	Stearns	F	Nutrients (phosphorus, nitrogen)	✓
Hook Lake	McLeod	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Union Lake	Rice	F	Nutrients (phosphorus, nitrogen)	✓
Venus Lake	Douglas	F	Nutrients (phosphorus, nitrogen)	—
Allie Lake	Renville	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Shell Lake	St. Louis	F	Mercury	✓
Roberds Lake	Rice	F	Nutrients (phosphorus, nitrogen)	✓
Charlotte Lake	Stevens	F	Nutrients (phosphorus, nitrogen)	—
Island Lake	Lyon	F	Nutrients (phosphorus, nitrogen)	✓
Cedar Lake	Scott	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Emily Lake	Pope	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Wing Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Rice Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Rice Lake	Anoka	F	Nutrients (phosphorus, nitrogen)	✓
Thompson Lake	Dakota	F	Nutrients (phosphorus, nitrogen), Salinity / chlorides	✓
Pokegama Lake	Pine	F	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
George Lake	Martin	F	Nutrients (phosphorus, nitrogen)	✓
George Lake	Blue Earth	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Jefferson Lake	Le Sueur	F	Nutrients (phosphorus, nitrogen)	✓
Upper Orono Lake	Sherburne	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Rhine Lake	Pine	F	Nutrients (phosphorus, nitrogen)	✓
Silver Lake	Olmsted	F	Mercury	✓
Big Woods Lake	Carver	F	Nutrients (phosphorus, nitrogen)	✓
Goose Lake	Ramsey	F	Nutrients (phosphorus, nitrogen)	✓
Goose Lake	Wright	F	Nutrients (phosphorus, nitrogen)	✓
Goose Lake	Carver	F	Nutrients (phosphorus, nitrogen)	✓
Goose Lake	Goodhue	F	Salinity / chlorides	—
Goose Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Typo Lake	Anoka	F	Nutrients (phosphorus, nitrogen)	✓
Powderhorn Lake	Hennepin	F	Mercury, Nutrients (phosphorus, nitrogen), Salinity / chlorides	✓
Hall Lake	Martin	F	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Como Lake	Ramsey	F	Mercury, Nutrients (phosphorus, nitrogen), Salinity / chlorides	✓
Fountain Lake	Wright	F	Nutrients (phosphorus, nitrogen)	✓
Fountain Lake	Freeborn	F	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Crystal Lake	Blue Earth	F	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Benton Lake	Carver	F	Nutrients (phosphorus, nitrogen)	✓
Foster Lake	Wright	F	Nutrients (phosphorus, nitrogen)	✓
Knife Lake	Kanabec	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Diamond Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Diamond Lake	Hennepin	F	Salinity / chlorides	✓
Mink Lake	Wright	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Ardmore Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Zumwalde Lake	Stearns	F	Nutrients (phosphorus, nitrogen)	✓
Stowe Lake	Douglas	F	Nutrients (phosphorus, nitrogen)	—
Elk Lake	Sherburne	F	Nutrients (phosphorus, nitrogen)	✓
Krays Lake	Stearns	F	Nutrients (phosphorus, nitrogen)	✓
Rush Lake	Sherburne	F	Nutrients (phosphorus, nitrogen)	✓
Sisseton Lake	Martin	F	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Wolf Lake	St. Louis	F	Mercury	—
Uhl Lake	Wright	F	Nutrients (phosphorus, nitrogen)	✓
Alice Lake	Otter Tail	F	Nutrients (phosphorus, nitrogen)	—
Cornelia Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Wood Lake	Yellow Medicine	F	Nutrients (phosphorus, nitrogen)	✓
Hiawatha Lake	Hennepin	F	Nutrients (phosphorus, nitrogen), Salinity / chlorides	✓
Arvilla Lake	Meeker	F	Mercury	✓
Vadnais Lake	Ramsey	F	Nutrients (phosphorus, nitrogen)	—
Duck Lake	Blue Earth	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Langdon Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Rose Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Loring Lake	Hennepin	F	Salinity / chlorides	✓
Spurzem Lake	Hennepin	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Cedar Island Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Whiteface Reservoir	St. Louis	F	Mercury	—
Circle Lake	Rice	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Little Rock Lake	Benton	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Knaus Lake	Stearns	F	Nutrients (phosphorus, nitrogen)	✓
Pioneer Lake	Chisago	F	Nutrients (phosphorus, nitrogen)	✓
Hanska Lake	Brown	F	Impaired biota (cause unknown)	—
Blueberry Lake	St. Louis	F	Nutrients (phosphorus, nitrogen)	—
Cleary Lake	Scott	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Hazeltine Lake	Carver	F	Nutrients (phosphorus, nitrogen)	✓
Loon Lake	Blue Earth	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Loon Lake	Jackson	F	Nutrients (phosphorus, nitrogen)	✓
Loon Lake	Waseca	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Sylvan Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Pepin Lake	Pepin	F	Nutrients (phosphorus, nitrogen)	✓
Cameron Lake	Polk	F	Nutrients (phosphorus, nitrogen)	✓
Miller Lake	Carver	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Mcknight Lake	Carver	F	Nutrients (phosphorus, nitrogen)	✓
Kohlman Lake	Ramsey	F	Salinity / chlorides	✓
Lost Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	—
Shields Lake	Rice	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Hydes Lake	Carver	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Parley Lake	Carver	F	Nutrients (phosphorus, nitrogen)	✓
Mazaska Lake	Rice	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Locke Lake	Anoka	F	Nutrients (phosphorus, nitrogen)	✓
Spring Lake	Hennepin	F	Salinity / chlorides	✓
Steamboat Lake	Aitkin	F	Mercury	—
Johnson Lake	Kandiyohi	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Johnson Lake	St. Louis	F	Mercury	✓
Hoff Lake	Meeker	F	Nutrients (phosphorus, nitrogen)	✓
Chub Lake	Dakota	F	Nutrients (phosphorus, nitrogen)	✓
Nelson Lake	Goodhue	F	Salinity / chlorides	—
Amber Lake	Martin	F	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Swede Lake	Carver	F	Nutrients (phosphorus, nitrogen)	✓
Staring Lake	Hennepin	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Augusta Lake	Dakota	F	Nutrients (phosphorus, nitrogen)	✓
Muewissen Lake	Carver	F	Nutrients (phosphorus, nitrogen)	✓
Malmedal Lake	Pope	F	Nutrients (phosphorus, nitrogen)	✓
Indianhead Lake	Hennepin	F	Mercury	✓
Simon Lake	Pope	F	Nutrients (phosphorus, nitrogen)	✓
Edina Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Dean Lake	Wright	F	Nutrients (phosphorus, nitrogen)	✓
Lower Orono Lake	Sherburne	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Hope Lake	Meeker	F	Nutrients (phosphorus, nitrogen)	✓
O'Leary Lake	Dakota	F	Mercury	✓
Turtle Lake	Ramsey	F	Impaired biota (cause unknown), Mercury	✓
Unn Lake	Hennepin	F	Mercury	✓
Cowhorn Lake	Itasca	F	Nutrients (phosphorus, nitrogen)	✓
Unn Pond	Dakota	F	Nutrients (phosphorus, nitrogen)	✓
Grass Lake	Hennepin	F	Salinity / chlorides	✓
Uhlenkolts Lake	Stearns	F	Nutrients (phosphorus, nitrogen)	✓
Cottonwood Lake	Lyon	F	Nutrients (phosphorus, nitrogen)	✓
Centerville Lake	Anoka	F	Nutrients (phosphorus, nitrogen)	✓
Wells Lake	Rice	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Rice Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Page Lake	Stevens	F	Mercury	✓
Pearl Lake	Jackson	F	Nutrients (phosphorus, nitrogen)	✓
Winona Lake	Douglas	F	Nutrients (phosphorus, nitrogen), Salinity / chlorides	✓
Mccarthy Lake	Dakota	F	Nutrients (phosphorus, nitrogen)	✓
Silver Lake	Ramsey	F	Mercury, Nutrients (phosphorus, nitrogen), Salinity / chlorides	✓
Stay Lake	Lincoln	F	Nutrients (phosphorus, nitrogen)	✓
East Toqua Lake	Big Stone	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Indian Lake	Nobles	F	Nutrients (phosphorus, nitrogen)	✓
Lady Slipper Lake	Lyon	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Maria Lake	Carver	F	Nutrients (phosphorus, nitrogen)	✓
Chaser Lake	Cook	F	Mercury	✓
South Silver Lake	Martin	F	Impaired biota (cause unknown)	—
Pamela Pond	Hennepin	F	Salinity / chlorides	✓
Elysian (Upper Lake	Waseca	F	Nutrients (phosphorus, nitrogen)	✓
Hunt Lake	Rice	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Thomson Reservoir	Carlton	F	Mercury	✓
Pickeral Lake	Freeborn	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Taft Lake	Hennepin	F	Salinity / chlorides	✓
Shakopee Lake	Chippewa	F	Nutrients (phosphorus, nitrogen)	—
Upper Sakatah Lake	Le Sueur	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Henry Lake	Le Sueur	F	Nutrients (phosphorus, nitrogen)	✓
Little Waverly Lake	Wright	F	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Quigley Lake	Dakota	F	Nutrients (phosphorus, nitrogen)	✓
Millstone Lake	Wright	F	Nutrients (phosphorus, nitrogen)	✓
Gaystock Lake	Carver	F	Nutrients (phosphorus, nitrogen)	✓
Little Mary Lake	Wright	F	Nutrients (phosphorus, nitrogen)	✓
Okabena Lake	Nobles	F	Nutrients (phosphorus, nitrogen)	✓
Northwood Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	—
Florida Slough Lake	Kandiyohi	F	Impaired biota (cause unknown), Mercury	✓
Ocheda Lake	Nobles	F	Nutrients (phosphorus, nitrogen)	✓
Wilhelm Lake	Wright	F	Nutrients (phosphorus, nitrogen)	✓
Little Tuttle Lake	Martin	F	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Byllesby Lake	Dakota	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Albion Lake	Wright	F	Nutrients (phosphorus, nitrogen)	✓
Current Lake Marsh	Murray	F	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen)	✓
Henshaw Lake	Wright	F	Nutrients (phosphorus, nitrogen)	✓
School Grove Lake	Lyon	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Double Lake	Cottonwood	F	Impaired biota (cause unknown), Nutrients (phosphorus, nitrogen), Pesticides	✓
Elizabeth Lake	Kandiyohi	F	Mercury, Salinity / chlorides	✓
Domeier Lake	Brown	F	Nutrients (phosphorus, nitrogen)	✓
Cowley Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Little Kandiyohi Lake	Kandiyohi	F	Nutrients (phosphorus, nitrogen)	✓
Lake Monongalia	Kandiyohi	F	Mercury, Salinity / chlorides	—
Eden Lake	Stearns	F	Impaired biota (cause unknown), Mercury, Nutrients (phosphorus, nitrogen)	✓
Gun Club Lake	Dakota	F	Mercury	✓
Marshan Lake	Anoka	F	Nutrients (phosphorus, nitrogen)	✓
Greenleaf Lake	Meeker	F	Nutrients (phosphorus, nitrogen)	✓
Mcmahon Lake	Scott	F	Mercury	✓
Bella Lake	Nobles	F	Nutrients (phosphorus, nitrogen)	✓
Mountain Lake	Cottonwood	F	Impaired biota (cause unknown), Mercury	✓
Gleason Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
North Stanchfield Lake	Isanti	F	Nutrients (phosphorus, nitrogen)	✓
Kansas Lake	Watonwan	F	Nutrients (phosphorus, nitrogen)	✓
South Stanchfield Lake	Isanti	F	Nutrients (phosphorus, nitrogen)	✓
Manomin Lake	Lake	F	Mercury	✓
East Arctic Lake	Scott	F	Mercury, Nutrients (phosphorus, nitrogen)	✓
Snyder Lake	Hennepin	F	Nutrients (phosphorus, nitrogen)	✓
Gonz Lake	Wright	F	Nutrients (phosphorus, nitrogen)	✓
Fourth Lake	Chisago	F	Nutrients (phosphorus, nitrogen)	✓

Frequently Asked Questions

How many lakes are impaired in Minnesota?

1,522 of 2,252 graded Minnesota lakes (68%) are listed as impaired in the most recent EPA ATTAINS reporting cycle. Of those, 519 are on the federal Clean Water Act §303(d) list and 1,187 have an approved Total Maximum Daily Load (TMDL) restoration plan.

What does Clean Water Act §303(d) mean?

Section 303(d) of the federal Clean Water Act requires every state to identify waters that don't meet water quality standards even after pollution control measures. Each listed water must then have a Total Maximum Daily Load (TMDL) developed — a plan that caps how much of each pollutant can enter the waterbody. The "303(d) list" is the impaired-waters list. The EPA reviews each state's list every two years.

What are the top causes of impairment in Minnesota?

The most common causes flagged across Minnesota's impaired lakes are: Mercury (1158 lakes); Nutrients (phosphorus, nitrogen) (499 lakes); Impaired biota (cause unknown) (157 lakes); Salinity / chlorides (65 lakes); PFAS (15 lakes); PCBs (7 lakes). Mercury is widespread in fish tissue across the upper Midwest from atmospheric deposition. Nutrient impairment (phosphorus, nitrogen) typically reflects agricultural runoff and urban stormwater.

Can I swim in an impaired lake?

It depends on the cause of impairment. A lake impaired for "mercury in fish tissue" is generally safe to swim in — the warning is about long-term consumption of fish. A lake impaired for "pathogens" (E. coli) or "algal growth" may pose a swimming risk and often has a separate beach advisory. Check the cause categories listed for each lake below, and consult your state health department's beach monitoring program for current advisories.

Where does this impairment data come from?

Every impairment record on this page comes from the EPA's ATTAINS (Assessment and TMDL Tracking and Implementation System) public dataset, the federal repository of state-reported water quality assessments. EPA ATTAINS is published as GeoParquet files on the EPA Office of Water S3 bucket and refreshed several times per year. Causes and use-support codes follow EPA's standard taxonomy.

Data source

Impairment data from the EPA ATTAINS (Assessment and TMDL Tracking and Implementation System) public dataset. Assessment unit IDs are matched to LakeGrade waterbodies by name and proximity; some lakes may not appear here if their ATTAINS name doesn't match our naming convention. For an official query, consult Minnesota's state water-quality agency.