Cleanest Lakes in Washington County, Illinois
Nashville City Lake in Washington County leads the rankings with a water quality grade of F and 1.3 ft of clarity. Below are the top 1 cleanest monitored lakes in Washington County, Illinois, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Nashville City Lake | Washington | F | 1.3 ft | 517 µg/L | - |