Cleanest Lakes in Macoupin County, Illinois
Otter Lake in Macoupin County leads the rankings with a water quality grade of D and 1.8 ft of clarity. Below are the top 1 cleanest monitored lakes in Macoupin County, Illinois, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Otter Lake | Macoupin | D | 1.8 ft | 37 µg/L | - |