Cleanest Lakes in Crawford County, Iowa
Nelson Lake in Crawford County leads the rankings with a water quality grade of D and 3.8 ft of clarity. Below are the top 2 cleanest monitored lakes in Crawford County, Iowa, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Nelson Lake | Crawford | D | 3.8 ft | - | 30.6 µg/L |
| 2 | Yellow Smoke Lake | Crawford | D | 3 ft | - | 21.6 µg/L |