Cleanest Lakes in Calhoun County, Iowa
North Twin Lake in Calhoun County leads the rankings with a water quality grade of F and 1.1 ft of clarity. Below are the top 1 cleanest monitored lakes in Calhoun County, Iowa, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | North Twin Lake | Calhoun | F | 1.1 ft | - | 31.4 µg/L |