Hypereutrophic

Hypereutrophic Lakes Across 38 States

Very high nutrients, dense algae, poor clarity. 100 lakes (6% of all graded lakes).

Hypereutrophic lakes (TSI above 70) are at the upper end of the productivity scale: visible algal blooms most weeks of summer, clarity often under 3 feet, and meaningful risk of harmful-algal-bloom toxin events. 100 hypereutrophic lakes are on the the 49 states and 2 Canadian provinces LakeQuality covers books. Almost none of them are deep — 3% break 50 feet. Shallow basin plus heavy nutrient input is the consistent recipe.

Hypereutrophic lakes overwhelmingly grade D or F — the trophic class and the grade are measuring closely-related dimensions of the same underlying nutrient regime.

Oligotrophic Mesotrophic Eutrophic Hypereutrophic

Lake	County	State	Grade	Clarity	Depth
Merritt Reservoir	Cherry	NE	B	2 ft	-
Pelican Lake	Cherry	NE	B	1.2 ft	-
Smith Lake	Sheridan	NE	B	1.7 ft	-
Crescent Lake	Garden	NE	B	0.8 ft	-
Goose Lake	Holt	NE	B	1 ft	-
Swan Lake	Holt	NE	B	1.8 ft	-
Nelson Lake	Oliver	ND	C	1.3 ft	-
Cedar Lake	Slope	ND	C	1.3 ft	-
Pibel Lake	Wheeler	NE	C	2 ft	-
Union Lake	Rice	MN	D	3 ft	10 ft
Rice Lake	Scott	MN	D	1.7 ft	-
Scotch Lake	Le Sueur	MN	D	2.6 ft	11 ft
Kansas Lake	Watonwan	MN	D	1.5 ft	7 ft
Yankton Lake	Lyon	MN	D	0.8 ft	8 ft
Gonz Lake	Wright	MN	D	-	-
Beaver Dam Lake	Dodge	WI	D	1 ft	-
Rice Lake	Dane	WI	D	1.5 ft	8 ft
Indian Lake	Dane	WI	D	0.7 ft	-
Big Eau Pleine Lake	Marathon	WI	D	1.5 ft	-
Eagle Lake	Racine	WI	D	1.5 ft	11 ft
Comus Lake	Walworth	WI	D	1.5 ft	6 ft
Lake Koshkonong	Jefferson	WI	D	1.7 ft	7 ft
Ludden Lake	Iowa	WI	D	1.5 ft	14 ft
Beckers Lake	Calumet	WI	D	1.5 ft	52.5 ft
Mason Lake	Adams	WI	D	1.1 ft	9 ft
Upper Vermillion Lake	Barron	WI	D	1.7 ft	9 ft
Odana Pond	Dane	WI	D	1 ft	5 ft
Lazy Lake	Columbia	WI	D	4 ft	8 ft
Yellowstone Lake	Lafayette	WI	D	1.3 ft	14 ft
Mead Lake	Clark	WI	D	2 ft	16 ft
Chilton Millpond	Calumet	WI	D	2.9 ft	7 ft
Little Lake Butte des Morts	Winnebago	WI	D	2 ft	18 ft
Garner Lake	Richland	WI	D	1.3 ft	8 ft
Dexter Lake	Wood	WI	D	1.5 ft	17 ft
Investment Court Pond	Dane	WI	D	-	-
Silent Street Pond	Dane	WI	D	-	-
Outlet To Lake Geneva	Walworth	WI	D	-	135 ft
Prairie Oaks Pond	Dane	WI	D	-	-
Cathedral Point Pond	Dane	WI	D	-	-
Decorah Lake	Juneau	WI	D	-	15 ft
Lake Tomah	Monroe	WI	D	-	19 ft
County K Marsh Lake	Green Lake	WI	D	-	-
Silver Creek Estuary Lake	Green Lake	WI	D	-	236 ft
Giltners Lake	Fond du Lac	WI	D	-	13 ft
Gage Lake	Cass	MI	D	-	-
Sassafras Lake	Van Buren	MI	D	-	-
Rodgers Lake	Cass	MI	D	-	-
Maumee R Upst Independence Dam Lake	Defiance	OH	D	-	-
Amann Reservoir	Morrow	OH	D	-	-
Froelich Dam Lake	Sioux	ND	D	3.9 ft	-
Odland Dam Lake	Golden Valley	ND	D	1.5 ft	-
Stanley Reservoir	Mountrail	ND	D	1.1 ft	-
Polk-Little Bass Lake	Polk	FL	D	1.3 ft	-
Alicetst Lake	Alachua	FL	D	3.3 ft	-
Polk-Big Bass Lake	Polk	FL	D	1 ft	-
Lake Roberta	Hillsborough	FL	D	1.3 ft	-
Megginnis Arm Off Crowder Landing Lake	Leon	FL	D	1 ft	-
Highlands-Josephine West Lake	Highlands	FL	D	1.5 ft	-
Lwc Lake	Brevard	FL	D	1.6 ft	-
Highlands-Wolf Lake	Highlands	FL	D	1 ft	-
Febin Lake	Glades	FL	D	1 ft	-
Ncenter Lake	Okeechobee	FL	D	1 ft	-
Bcl Lake	Indian River	FL	D	2 ft	-
Alligator Lake	Pinellas	FL	D	2.6 ft	-
Trout Lk Eus Lake	Lake	FL	D	1.8 ft	-
Ft Meade Pit Ne Lake	Polk	FL	D	1.5 ft	-
Indian River-Blue Cypress Lake	Indian River	FL	D	2 ft	-
Rosslake	Putnam	FL	D	1.3 ft	-
Lksuggs Lake	Putnam	FL	D	1.6 ft	-
Seminole-Jesup Lake	Seminole	FL	D	1 ft	-
Polk-Boca Cove Lake	Polk	FL	D	1.4 ft	-
Seminole-Jesup North Lake	Seminole	FL	D	1 ft	-
Sarasota-Cormorant Lake	Sarasota	FL	D	2.4 ft	-
Yale Marsh Pk Lake	Lake	FL	D	1.6 ft	-
Irvin Lake	Hernando	FL	D	1.3 ft	-
Hernando-Mountain Lake	Hernando	FL	D	2.3 ft	-
Lake Monroe	Volusia	FL	D	1.6 ft	-
Carter Rd Y Pit Lake	Polk	FL	D	2.5 ft	-
Lake of the Woods	Orange	FL	D	1.3 ft	-
Tiger Lake	Polk	FL	D	1 ft	-
Polk-Flora Lake	Polk	FL	D	1.5 ft	-
Saddle Crk Pk Z Lake	Polk	FL	D	2 ft	-
Marion-Charles Lake	Marion	FL	D	1 ft	-
Lake Richmond	Orange	FL	D	1 ft	-
Lake Seminole	Pinellas	FL	D	1 ft	-
Alachua-Newnan Lake	Alachua	FL	D	1.3 ft	-
New Lake	Alachua	FL	D	1 ft	-
Marion-Eaton Lake	Marion	FL	D	0.8 ft	-
Goosecent Lake	Putnam	FL	D	1.6 ft	-
Sarasota-Uplands Lake	Sarasota	FL	D	0.8 ft	-
Polk-Gaskin'S Cut Lake	Polk	FL	D	1.4 ft	-
Ruthlkecen Lake	Brevard	FL	D	1.3 ft	-
Sarasota-Upper Myakka Lake	Sarasota	FL	D	2 ft	-
Saddle Crk Pk X Lake	Polk	FL	D	1.8 ft	-
Alachua-Little Orange Lake	Alachua	FL	D	2.8 ft	-
Pinellas-Jungle Lake	Pinellas	FL	D	2.3 ft	-
Lake Hancock	Polk	FL	D	1 ft	-
Lake Okeechobee	Palm Beach	FL	D	1 ft	-
Florencelk Lake	Brevard	FL	D	1.3 ft	-
Bonnet-Col Lake	Polk	FL	D	0.8 ft	-

Frequently Asked Questions

What is an hypereutrophic lake?

Very high nutrients, dense algae, poor clarity. There are 100 hypereutrophic lakes across the 49 states and 2 Canadian provinces LakeQuality covers, representing 6% of all graded lakes.