Cleaner Lake Finder
For every Grade B–F lake across the 49 states and 2 Canadian provinces LakeQuality covers, we surface up to five higher-graded alternatives within 30 miles. Same state, same region — just cleaner water. Every grade comes from real EPA samples.
Biggest cleanup swaps
Lakes where the closest higher-graded alternative offers the largest water quality improvement.
F→A
Long Lake → Eagle Lake
Kandiyohi → Kandiyohi · mi · Minnesota
F→A
Big Swan Lake → Moose Lake
Meeker → Wright · mi · Minnesota
F→A
Unnamed Lake → Minnie-Belle Lake
Meeker → Meeker · mi · Minnesota
F→A
Unnamed Lake → Union Lake
Polk → Polk · mi · Minnesota
F→A
Jonathan Lake → Brickyard Lake
Carver → Carver · mi · Minnesota
F→A
Peltier Lake → Otter Lake
Anoka → Ramsey · mi · Minnesota
F→A
Eagle Lake → Pomerleau Lake
Hennepin → Hennepin · mi · Minnesota
F→A
Star Lake → Minnie-Belle Lake
Meeker → Meeker · mi · Minnesota
F→A
Fish Lake → Ember Lake
Wright → Wright · mi · Minnesota
F→A
East Solomon Lake → Eagle Lake
Kandiyohi → Kandiyohi · mi · Minnesota
F→A
Norway Lake → Florida Lake
Kandiyohi → Kandiyohi · mi · Minnesota
F→A
Grace Lake → Brickyard Lake
Carver → Carver · mi · Minnesota
F→A
Bass Lake → Pomerleau Lake
Hennepin → Hennepin · mi · Minnesota
F→A
Island Lake → Spring Lake
Mahnomen → Polk · mi · Minnesota
F→A
Emily Lake → Unnamed Lake
Le Sueur → Nicollet · mi · Minnesota
F→A
Emily Lake → School Lake
Chisago → Chisago · mi · Minnesota
F→A
Goose Lake → Birch Lake
Ramsey → Ramsey · mi · Minnesota
F→A
Typo Lake → Hoffman Lake
Anoka → Isanti · mi · Minnesota
F→A
Crystal Lake → Sweeney Lake
Hennepin → Hennepin · mi · Minnesota
F→A
Diamond Lake → Grass Lake
Hennepin → Anoka · mi · Minnesota
F→A
Mink Lake → Cedar Lake
Wright → Wright · mi · Minnesota
F→A
Stowe Lake → Chippewa Lake
Douglas → Douglas · mi · Minnesota
F→A
Oak Lake → Union Lake
Polk → Polk · mi · Minnesota
F→A
Oak Lake → Mud Lake
Becker → Becker · mi · Minnesota
How this works
- Data: EPA Water Quality Portal samples — phosphorus, chlorophyll-a, nitrogen, turbidity. Secchi is shown, not scored.
- Grading: EPA National Lakes Assessment 2022 ecoregion classes. See methodology.
- Filter: within 30 miles, same state, strictly higher numeric score, sufficient monitoring data.
- Rank: by grade improvement, with a small proximity tiebreak.