Mercer County Lake
Mercer County, New Jersey290 acresView mapDirections
No nutrient or algae sampling on record from NJDEP for this lake.
- Impaired · Impaired biota (cause unknown)
Mercer County Lake in Mercer County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Surface area: 290 acres.
Mercer County Lake is a 290-acre lake in Mercer County, New Jersey.
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
Swimming conditions
No readingBacteria advisory
Nutrient and algae readings are not a swimming clearance. Mercer County Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown), metals (other than mercury), nutrients (phosphorus, nitrogen), pathogens (E. coli, fecal), pesticides, pCBs. Check local advisories before you swim.
Whether Mercer County 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 Mercer County Lake
These are the measurements NJDEP publishes for Mercer County 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. TSI undefined.
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Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
290 acres
Shoreline
6.1 mi
No bathymetric survey has been published for Mercer County Lake, so its depth is not documented here.
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Fishing Mercer County Lake
EPA Impairment Status
Mercer County 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 NJ02040105230050-01 · Official waterbody report
Nearby Lakes in Mercer County
Frequently asked questions about Mercer County Lake
Where is Mercer County Lake?
- Mercer County Lake is a lake in Mercer County, New Jersey. Its water-quality measurements are published by NJDEP and shown on this page as reported.
What is the water quality of Mercer County Lake?
- Mercer County Lake in Mercer County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Surface area: 290 acres.
Is Mercer County Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Mercer County Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown), metals (other than mercury), nutrients (phosphorus, nitrogen), pathogens (E. coli, fecal), pesticides, pCBs. Check local advisories before you swim.
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Where this data comes from
Measurements for Mercer County Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database