Cleanest Lakes in San Juan County, Washington
Nla Lake in San Juan County leads the rankings with a water quality grade of D and 6.1 ft of clarity. Below are the top 1 cleanest monitored lakes in San Juan County, Washington, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Nla Lake | San Juan | D | 6.1 ft | 57500 µg/L | 7.1 µg/L |