Cleanest Lakes in Pondera County, Montana
Horn Lake in Pondera County leads the rankings with a water quality grade of NR. Below are the top 11 cleanest monitored lakes in Pondera County, Montana, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Horn Lake | Pondera | NR | - | - | - |
| 2 | Mitten Lake | Pondera | NR | - | - | - |
| 3 | Swift Reservoir | Pondera | NR | - | - | - |
| 4 | Twin Lakes | Pondera | NR | - | - | - |
| 5 | Tedson Reservoir | Pondera | NR | - | - | - |
| 6 | Howes Lakes | Pondera | NR | - | - | - |
| 7 | Green Lake | Pondera | NR | - | - | - |
| 8 | Alkali Lake | Pondera | NR | - | - | - |
| 9 | Lake Frances | Pondera | NR | - | - | - |
| 10 | Abbott Lake | Pondera | NR | - | - | - |
| 11 | Eyraud Lakes | Pondera | NR | - | - | - |
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