Cleanest Lakes in Illinois
Lake Calumet in Cook County leads the rankings with a water quality grade of A and 4.1 ft of clarity. Below are the top 6 cleanest monitored lakes in Illinois, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Lake Calumet | Cook | A | 4.1 ft | 16.5 µg/L | 5.4 µg/L |
| 2 | Kinkaid Lake | Jackson | C | - | 23.5 µg/L | 15.8 µg/L |
| 3 | Long Lake | Lake | F | 3.4 ft | 81 µg/L | 57.1 µg/L |
| 4 | Salem Lake | Marion | F | 1 ft | 234 µg/L | 77.5 µg/L |
| 5 | Vandalia Lake | Fayette | F | 1.3 ft | 103.5 µg/L | 84.4 µg/L |
| 6 | Fairfield Lake | Wayne | F | 1.3 ft | 148 µg/L | 35.4 µg/L |
More Answers for Illinois
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