Weequahic Lake
Weequahic Lake in Essex County, New Jersey has a water quality grade of F (Algae-prone). Water clarity: 3.9 ft visibility. Phosphorus: 60 µg/L. Chlorophyll-a (algae): 52.3 µg/L.
- Clarity
- 3.9 ft
- Type
- Hypereutrophic
Grade F measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Weequahic Lake →
Weequahic Lake is a highly nutrient-loaded hypereutrophic lake in Essex County, New Jersey. Water quality is graded F based on 2 sampling years through 2024. Compared to the 1 other monitored lakes in Essex County, Weequahic Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-10-15. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyAlgae risk
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Algae and nutrients are often high — check current advisories before swimming. Skip the water if you see scum or a paint-like bloom
Water Quality Grade: F (Algae-prone)
Murky, only visible to about 3.9 ft. Phosphorus level: 60 µg/L. Chlorophyll-a: 52.3 µg/L. Trophic State Index: 63.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.9 ft | Not graded |
| Phosphorus | 60 µg/L | Poor |
| Chlorophyll-a (Algae) | 52.3 µg/L | Poor |
| Trophic State Index (TSI) | 63 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Weequahic Lake
Compare lakeside cabins, hotels, and vacation rentals near Weequahic Lake in Essex County, New Jersey — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Weequahic Lake are listed below.
Top-rated places to stay near Weequahic Lake
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Fishing Weequahic Lake
EPA Impairment Status
Weequahic Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit NJ02030104010010-01 · Official waterbody report · Matched by proximity (2.37 km)
County Ranking
Ranked #2 of 2 lakes in Essex County
Nearby Lakes in Essex County
Frequently asked questions about Weequahic Lake
Where is Weequahic Lake?
- Weequahic Lake is a lake in Essex County, New Jersey. LakeQuality grades it F for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Weequahic Lake?
- Weequahic Lake in Essex County, New Jersey has a water quality grade of F (Algae-prone). Water clarity: 3.9 ft visibility. Phosphorus: 60 µg/L. Chlorophyll-a (algae): 52.3 µg/L.
Is Weequahic Lake safe to swim in?
- Algae and nutrients are often high — check current advisories before swimming. Skip the water if you see scum or a paint-like bloom. Weequahic Lake has a water quality grade of F (Algae-prone). Algae concentration (chlorophyll-a) is 52.3 µg/L. Always check local health department advisories before swimming.
Explore Weequahic Lake across LakeGrade
More New Jersey Lake Rankings
Other Grade F Lakes in New Jersey
Hypereutrophic Lakes in New Jersey
Where this data comes from
88 measurements from 3 monitoring stations, 2023–2024. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- NJDEP Bureau of Freshwater and Biological Monitoring
NJDEP_BFBM88 samples · 2023–2024
Analytical methods
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (3)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database