Cleanest Lakes in Elmore County, Idaho
Cat Creek Lake in Elmore County leads the rankings with a water quality grade of A. Below are the top 4 cleanest monitored lakes in Elmore County, Idaho, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Cat Creek Lake | Elmore | A | - | 17 µg/L | 4.4 µg/L |
| 2 | Arrowrock Reservoir | Elmore | B | 12.5 ft | 35 µg/L | 1.5 µg/L |
| 3 | Arrowrock Reservoir | Elmore | C | 9.5 ft | 55.5 µg/L | 6.8 µg/L |
| 4 | Nla Lake | Elmore | D | 3.4 ft | 93000 µg/L | 27.1 µg/L |