Green Brook Pond
Bergen County, New JerseyView mapDirections
NJDEP publishes the water-quality measurements for Green Brook Pond. Here is what has been measured.
- Eutrophic
- Impaired · Dioxins
- Limited data
Green Brook Pond in Bergen County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Water clarity: 4.4 ft visibility. Phosphorus: 43.1 µg/L. Chlorophyll-a (algae): 24.1 µg/L.
Green Brook Pond is a productive, nutrient-rich eutrophic lake in Bergen County, New Jersey.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2021-10-27. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Green Brook Pond is listed impaired under Clean Water Act §303(d) (IR 5) for dioxins, mercury, pesticides, pCBs, toxic organics. Check local advisories before you swim.
Whether Green Brook Pond is safe to swim in today is a call for the New Jersey Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Green Brook Pond
These are the measurements NJDEP publishes for Green Brook Pond, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 4.4 ft. Phosphorus 43.1 µg/L. Chlorophyll-a 24.1 µg/L. TSI 59.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.4ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 43.1µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 24.1µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 59 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Green Brook Pond
Answers come straight from the public measurements and survey records on this page.
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Stays 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 readings cover nutrients and algae, not lodging. Cabins and rentals around Green Brook Pond are listed below.
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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
Designated uses not supporting: Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NJ02030101170010-01 · Official waterbody report
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. Its water-quality measurements are published by NJDEP and shown on this page as reported.
What is the water quality of Green Brook Pond?
- Green Brook Pond in Bergen County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. 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?
- Nutrient and algae readings are not a swimming clearance. Green Brook Pond is listed impaired under Clean Water Act §303(d) (IR 5) for dioxins, mercury, pesticides, pCBs, toxic organics. Check local advisories before you swim.
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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)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database