Cumberland County Lake Quality
New Jersey, 2 lakes, average grade F (Algae-prone)
Only 2 lakes in Cumberland County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. The county average is F — the most-stressed bracket in our rubric. Most monitored lakes here show persistent nutrient loading and algal pressure.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Sunset Lake (F) is the cleanest in the county.
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Quick Answers for Cumberland County
Planning a trip? Check special fishing regulations for Sunset Lake — or check the official New Jersey fishing regulations.
All Lakes in Cumberland County
2 lakes · 1 graded, 1 not rated1 graded lake · 1 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | FSunset LakeCumberland | F | 1.5 ft | 60 µg/L | 32.9 µg/L | No recent samples | Not recorded |
| NRMacrie PondCumberland | NR | 3.1 ft | 13.8 µg/L | 6 µg/L | No recent samples | Not recorded |
NR = not rated: the monitoring record does not meet the evidence bar for a grade. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
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Other Counties in New Jersey
See how Cumberland County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 49 states and 2 Canadian provinces.
Source: EPA National Aquatic Resource Surveys, 2026.