Cleanest Lakes in Thurston County, Washington
Lake: Ward Lake in Thurston County leads the rankings with a water quality grade of A. Below are the top 10 cleanest monitored lakes in Thurston County, Washington, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Lake: Ward Lake | Thurston | A | - | 10.5 µg/L | 3.2 µg/L |
| 2 | Lake: Summit Lake | Thurston | A | - | 6 µg/L | 1.3 µg/L |
| 3 | Lake: Deep Lake | Thurston | A | - | 7 µg/L | 3.8 µg/L |
| 4 | Lake: Hicks Lake | Thurston | A | - | 16 µg/L | 8.5 µg/L |
| 5 | Lake: Pattison Lake | Thurston | B | - | 26.5 µg/L | 10.5 µg/L |
| 6 | Lake: Barnes Lake | Thurston | B | - | 27 µg/L | 11.6 µg/L |
| 7 | Lake: Offutt Lake | Thurston | B | - | 23 µg/L | 11 µg/L |
| 8 | Nla Lake | Thurston | D | 7.7 ft | 26517.8 µg/L | 10.4 µg/L |
| 9 | Nla Lake | Thurston | D | 4.9 ft | 46029.7 µg/L | 21.6 µg/L |
| 10 | Lake | Thurston | F | - | 126.5 µg/L | 34 µg/L |