Cleanest Lakes in Butler County, Pennsylvania
Thorn Reservoir in Butler County leads the rankings on measured clarity and nutrients. Below are the top 2 cleanest monitored lakes in Butler County, Pennsylvania, ranked on EPA nutrient and algae measurements.
Ranked List
| # | Lake | County | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|
| 1 | Thorn Reservoir | Butler | - | - | - |
| 2 | Lake Oneida | Butler | - | - | - |
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