Cleanest Lakes in Washington County, Idaho
Nla Lake in Washington County leads the rankings with a water quality grade of B and 15.1 ft of clarity. Below are the top 2 cleanest monitored lakes in Washington County, Idaho, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Nla Lake | Washington | B | 15.1 ft | 41000 µg/L | 0.3 µg/L |
| 2 | Mann Creek Reservoir | Washington | D | - | 53.5 µg/L | 179 µg/L |