Cleanest Lakes in Marion County, Oregon
Stone Quarry Lake in Marion County leads the rankings with a water quality grade of NR. Below are the top 13 cleanest monitored lakes in Marion County, Oregon, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Stone Quarry Lake | Marion | NR | - | - | - |
| 2 | Willamette Slough | Marion | NR | - | - | - |
| 3 | Silver Creek Reservoir | Marion | NR | - | - | - |
| 4 | McKay Reservoir | Marion | NR | - | - | - |
| 5 | Spada Reservoir | Marion | NR | - | - | - |
| 6 | Skookum Lakes | Marion | NR | - | - | - |
| 7 | Mission Creek Reservoir | Marion | NR | - | - | - |
| 8 | Horseshoe Lake | Marion | NR | - | - | - |
| 9 | Mission Lake | Marion | NR | - | - | - |
| 10 | Clear Lake | Marion | NR | - | - | - |
| 11 | Elk Lake | Marion | NR | - | - | - |
| 12 | Breitenbush Lake | Marion | NR | - | - | - |
| 13 | Fish Lake | Marion | NR | - | - | - |
More Answers for Marion County, Oregon
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