Fox Mill Lake
Salem County, New Jersey16 acresView mapDirections
NJDEP publishes the water-quality measurements for Fox Mill Lake. Here is what has been measured.
- Impaired · Impaired biota (cause unknown)
- Limited data
Fox Mill Lake in Salem County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Chlorophyll-a (algae): 131 µg/L. Surface area: 16 acres.
Fox Mill Lake is a 16-acre lake in Salem County, New Jersey.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2020-10-08. Methodology: how these readings are compared.
Swimming conditions
No readingBacteria advisory
Nutrient and algae readings are not a swimming clearance. Fox Mill Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown), mercury, metals (other than mercury), nutrients (phosphorus, nitrogen), oxygen depletion (low DO), pathogens (E. coli, fecal), pH / acidity, turbidity. Check local advisories before you swim.
Whether Fox Mill Lake 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 Fox Mill Lake
These are the measurements NJDEP publishes for Fox Mill Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Chlorophyll-a 131 µg/L. TSI 78.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | 131µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 78 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Fox Mill Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
16 acres
No bathymetric survey has been published for Fox Mill Lake, so its depth is not documented here.
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Fishing Fox Mill Lake
Reservoir Info (USACE NID)
Fox Mill Lake is a man-made reservoir impounded by the Daretown Lake Dam (completed 1915), built primarily for recreation on the Salem River; earth-type dam, 16 ft tall and 575 ft long.
- Surface area
- 16 ac
- Normal storage
- 6 ac-ft
- Drainage area
- 1.8 sq mi
- Hazard class
- Significant
- Owner
- Township of Upper Pittsgrove
Source: USACE National Inventory of Dams, NID ID NJ00107 · Operator website · Matched by proximity (0.02 km)
EPA Impairment Status
Fox Mill Lake 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: Drinking water, Aquatic life, Fish consumption, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NJ02040206030010-01 · Official waterbody report
Nearby Lakes in Salem County
Frequently asked questions about Fox Mill Lake
Where is Fox Mill Lake?
- Fox Mill Lake is a lake in Salem County, New Jersey. Its water-quality measurements are published by NJDEP and shown on this page as reported.
What is the water quality of Fox Mill Lake?
- Fox Mill Lake in Salem County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Chlorophyll-a (algae): 131 µg/L. Surface area: 16 acres.
Is Fox Mill Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Fox Mill Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown), mercury, metals (other than mercury), nutrients (phosphorus, nitrogen), oxygen depletion (low DO), pathogens (E. coli, fecal), pH / acidity, turbidity. Check local advisories before you swim.
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Where this data comes from
14 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- USGS New Jersey Water Science Center
USGS-NJ14 samples · 2020
Analytical methods
- Plant pigments, sonication & 445
- HACH 2100Q, NTRU
- YSI EXO turbidity sensor, FNU
Monitoring station identifiers (1)
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