Passaic County Lake Quality
New Jersey, 12 lakes, average grade F (Algae-prone)
Passaic County has 12 graded 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. The county average is F — the most-stressed bracket in our rubric. Most monitored lakes here show persistent nutrient loading and algal pressure.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Green Turtle Lake (D); the most-stressed is By Fox Island Lake (F).
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Quick Answers for Passaic County
Planning a trip? Check special fishing regulations for Green Turtle Lake — or check the official New Jersey fishing regulations.
All Lakes in Passaic County
12 lakes · 6 graded, 6 not rated6 graded lakes · 6 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | DGreen Turtle LakePassaic | D | 7.2 ft | 13.9 µg/L | 16.1 µg/L | No recent samples | Not recorded |
| 2 | DSkyline LakesPassaic | D | 5.7 ft | 42.1 µg/L | 25.9 µg/L | No recent samples | Not recorded |
| 3 | FBy Fox Island LakePassaic | F | No recent samples | 39 µg/L | 43.5 µg/L | No recent samples | Not recorded |
| 4 | FBy Storm Island LakePassaic | F | No recent samples | 36 µg/L | 39.7 µg/L | No recent samples | Not recorded |
| 5 | FBy the Browns Point State Park LakePassaic | F | No recent samples | 44 µg/L | 42.7 µg/L | No recent samples | Not recorded |
| 6 | FSouth Shore Marina LakePassaic | F | No recent samples | 48 µg/L | 38.9 µg/L | No recent samples | Not recorded |
| NRCupsaw LakePassaic | NR | 4.3 ft | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRGlen Wild LakePassaic | NR | 8.5 ft | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRGreenwood LakePassaic | NR | 2.1 ft | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRSurprise LakePassaic | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRTerrace PondPassaic | NR | 14.1 ft | 70 µg/L | 1.8 µg/L | No recent samples | Not recorded | |
| NRWest PondPassaic | NR | No recent samples | No recent samples | No recent samples | 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 Passaic 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.