Cleanest Lakes in Valley County, Idaho
Nla Lake in Valley County leads the rankings with a water quality grade of A and 18.6 ft of clarity. Below are the top 14 cleanest monitored lakes in Valley County, Idaho, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Nla Lake | Valley | A | 18.6 ft | 10.2 µg/L | 0.7 µg/L |
| 2 | Nla Lake | Valley | A | - | 18.2 µg/L | 3.9 µg/L |
| 3 | Deadwood Reservoir | Valley | A | 17.2 ft | 14 µg/L | 1.7 µg/L |
| 4 | Deadwood Res Off Face of Dam Lake | Valley | A | - | 25 µg/L | 2.3 µg/L |
| 5 | Cascade Reservoir A Sugar Loaf Island | Valley | B | 8.5 ft | 28 µg/L | 1.1 µg/L |
| 6 | Cascade R W of Sugarloaf Island Lake | Valley | B | 8.2 ft | 28 µg/L | 8 µg/L |
| 7 | Cascade Reservoir | Valley | B | 8.2 ft | 31 µg/L | 1.1 µg/L |
| 8 | Cascade R Lake | Valley | C | 9.2 ft | 32 µg/L | 5.3 µg/L |
| 9 | Cascade Reservoir Inlet | Valley | C | 7.3 ft | 20 µg/L | 12.7 µg/L |
| 10 | Nla Lake | Valley | C | 7.7 ft | 34000 µg/L | 4.5 µg/L |
| 11 | Nla Lake | Valley | C | 9 ft | 43.9 µg/L | 17 µg/L |
| 12 | Cascade R Lake | Valley | C | 5.7 ft | 30 µg/L | 8.6 µg/L |
| 13 | Nla Lake | Valley | C | 4.4 ft | 75000 µg/L | 3.8 µg/L |
| 14 | Cas Reservoir Inlet Between Lf And | Valley | C | 4.3 ft | 40 µg/L | 12.4 µg/L |