Warren County Lake Quality
Pennsylvania, 3 lakes, measured by PA DEP
Warren County has 3 monitored lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. 1 of those lake carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. Phosphorus and algae readings vary widely across Warren County; the per-lake pages below carry the numbers.
Many of the county's lakes are deep glacial basins, over 50 feet at their deepest point, which gives them thermal stratification and a buffer against summer warming. Allegheny Reservoir has the lowest nutrient and algae readings in the county.
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Quick Answers for Warren County
Planning a trip? Check special fishing regulations for Allegheny Reservoir — or check the official Pennsylvania fishing regulations.
All Lakes in Warren County
3 lakes · 1 ranked on readings, 2 without enough sampling1 lake ranked on readings · 2 without enough sampling, hidden
| # | Lake | Clarity | Phosphorus | Algae | Trophic | Max Depth | Access |
|---|---|---|---|---|---|---|---|
| 1 | Allegheny ReservoirWarren | No recent samples | 13 µg/L | 9.8 µg/L | No recent samples | 131.2 ft | ✓ Public |
| Seneca Pumped Storage ReservoirWarren | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Chapman Dam ReservoirWarren | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | ✓ Public |
NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.
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Source: the Pennsylvania Department of Environmental Protection. See data sources.