Hunterdon County Lake Quality
New Jersey, 3 lakes, measured by NJDEP
Hunterdon 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. 2 of those lakes carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. Most monitored lakes in Hunterdon County carry favourable nutrient and algae readings for New Jersey.
The county's lakes lean shallow, which makes the readings sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest measured lake is Round Valley Reservoir.
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Quick Answers for Hunterdon County
Planning a trip? Check special fishing regulations for Round Valley Reservoir — or check the official New Jersey fishing regulations.
All Lakes in Hunterdon County
3 lakes · 2 ranked on readings, 1 without enough sampling2 lakes ranked on readings · 1 without enough sampling, hidden
| # | Lake | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|
| 1 | Round Valley ReservoirHunterdon | 26.9 ft | 7 µg/L | 1.3 µg/L | No recent samples | Not recorded |
| 2 | Cushetunk LakeHunterdon | 0.8 ft | 81.8 µg/L | 27.3 µg/L | No recent samples | Not recorded |
| Round Valley Intake PondHunterdon | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded |
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 New Jersey Department of Environmental Protection. See data sources.