Cleanest Lakes in Lincoln County, Montana
Nla Lake in Lincoln County leads the rankings with a water quality grade of A and 16.9 ft of clarity. Below are the top 14 cleanest monitored lakes in Lincoln County, Montana, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Nla Lake | Lincoln | A | 16.9 ft | 13.8 µg/L | 2.5 µg/L |
| 2 | Nla Lake | Lincoln | A | 25.4 ft | 13.4 µg/L | 1.3 µg/L |
| 3 | Lake Koocanusa | Lincoln | A | - | 4 µg/L | 2.3 µg/L |
| 4 | Lake Koocanusa | Lincoln | A | - | 4.5 µg/L | 1.4 µg/L |
| 5 | Sophie Lake | Lincoln | A | - | 11.1 µg/L | 2.4 µg/L |
| 6 | Tetrault Lake | Lincoln | A | - | 7.5 µg/L | 3.2 µg/L |
| 7 | Dickey Lake | Lincoln | A | - | 11.6 µg/L | 2.2 µg/L |
| 8 | Fish Lake | Lincoln | A | - | 9.5 µg/L | 2.3 µg/L |
| 9 | Murphy Lake | Lincoln | A | - | 6.5 µg/L | 1.8 µg/L |
| 10 | Glen Lake | Lincoln | A | - | 4.5 µg/L | 1.1 µg/L |
| 11 | Big Therriault Lake | Lincoln | A | - | 2.4 µg/L | 0.4 µg/L |
| 12 | Nla Lake | Lincoln | A | 14.1 ft | 11.9 µg/L | 1.5 µg/L |
| 13 | Lake Koocanusa | Lincoln | A | 13.1 ft | 8 µg/L | 2.5 µg/L |
| 14 | Lake Koocanusa | Lincoln | A | 11.5 ft | 6 µg/L | 2.1 µg/L |