Green Brook Pond
Green Brook Pond in Bergen County, New Jersey has a water quality grade of D (Nutrient-rich). Water clarity: 4.4 ft visibility. Phosphorus: 43.1 µg/L. Chlorophyll-a (algae): 24.1 µg/L.
- Clarity
- 4.4 ft
- Type
- Eutrophic
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Green Brook Pond →
Green Brook Pond is a productive, nutrient-rich eutrophic lake in Bergen County, New Jersey. Water quality is graded D based on 2 sampling years through 2021.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2021-10-27. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLimited data
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.
Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum
Water Quality Grade: D (Nutrient-rich)
Murky, only visible to about 4.4 ft. Phosphorus level: 43.1 µg/L. Chlorophyll-a: 24.1 µg/L. Trophic State Index: 59.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.4 ft | Not graded |
| Phosphorus | 43.1 µg/L | Poor |
| Chlorophyll-a (Algae) | 24.1 µg/L | Poor |
| Trophic State Index (TSI) | 59 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Green Brook Pond
Compare lakeside cabins, hotels, and vacation rentals near Green Brook Pond in Bergen 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 Green Brook Pond are listed below.
Top-rated places to stay near Green Brook Pond
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Fishing Green Brook Pond
EPA Impairment Status
Green Brook Pond is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NJ02030101170010-01 · Official waterbody report · Matched by proximity (2.79 km)
County Ranking
Ranked #1 of 1 lakes in Bergen County
Nearby Lakes in Bergen County
Frequently asked questions about Green Brook Pond
Where is Green Brook Pond?
- Green Brook Pond is a lake in Bergen County, New Jersey. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Green Brook Pond?
- Green Brook Pond in Bergen County, New Jersey has a water quality grade of D (Nutrient-rich). Water clarity: 4.4 ft visibility. Phosphorus: 43.1 µg/L. Chlorophyll-a (algae): 24.1 µg/L.
Is Green Brook Pond safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Green Brook Pond has a water quality grade of D (Nutrient-rich). Algae concentration (chlorophyll-a) is 24.1 µg/L. Always check local health department advisories before swimming.
Explore Green Brook Pond across LakeGrade
More New Jersey Lake Rankings
Other Grade D Lakes in New Jersey
Eutrophic Lakes in New Jersey
Where this data comes from
27 measurements from 2 monitoring stations, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- NJDEP Bureau of Freshwater and Biological Monitoring
NJDEP_BFBM27 samples · 2021
Analytical methods
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (2)
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