Cleanest Lakes in Lewis and Clark County, Montana
Nla Lake in Lewis and Clark County leads the rankings with a water quality grade of A and 15.9 ft of clarity. Below are the top 2 cleanest monitored lakes in Lewis and Clark County, Montana, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Nla Lake | Lewis and Clark | A | 15.9 ft | 12.3 µg/L | 0.8 µg/L |
| 2 | Canyon Ferry Lake | Lewis and Clark | B | 11.5 ft | 39 µg/L | - |