Cleanest Lakes in Mahaska County, Iowa
Hawthorn Lake in Mahaska County leads the rankings with a water quality grade of D and 2.4 ft of clarity. Below are the top 3 cleanest monitored lakes in Mahaska County, Iowa, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Hawthorn Lake | Mahaska | D | 2.4 ft | - | 27.5 µg/L |
| 2 | White Oak Lake | Mahaska | F | 1.4 ft | - | 68.7 µg/L |
| 3 | Lake Keomah | Mahaska | F | 1.5 ft | - | 63 µg/L |