Cleanest Lakes in San Juan County, Washington
Spencer Lake in San Juan County leads the rankings with a water quality grade of NR. Below are the top 9 cleanest monitored lakes in San Juan County, Washington, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Spencer Lake | San Juan | NR | - | - | - |
| 2 | Hummel Lake | San Juan | NR | - | - | - |
| 3 | Zyistra Lake | San Juan | NR | - | - | - |
| 4 | Trout Lake | San Juan | NR | - | - | - |
| 5 | Roche Harbor Lake | San Juan | NR | - | - | - |
| 6 | Martin Lake | San Juan | NR | - | - | - |
| 7 | Horseshoe Lake | San Juan | NR | - | - | - |
| 8 | Mountain Lake | San Juan | NR | - | - | - |
| 9 | Cascade Lake | San Juan | NR | - | - | - |
More Answers for San Juan County, Washington
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