Wanaque Reservoir
Passaic County, New Jersey1,971 acresView mapDirections
No nutrient or algae sampling on record from NJDEP for this lake.
- Impaired · Mercury
Wanaque Reservoir in Passaic County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Surface area: 1971 acres.
Wanaque Reservoir is a 1,971-acre lake in Passaic County, New Jersey.
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
What Wanaque Reservoir is good for
From access and monitoring records, not editorial picks.
- Big water1,971 acres
Swimming conditions
No readingBacteria advisory
Nutrient and algae readings are not a swimming clearance. Wanaque Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, metals (other than mercury), pathogens (E. coli, fecal). Check local advisories before you swim.
Whether Wanaque Reservoir 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 Wanaque Reservoir
These are the measurements NJDEP publishes for Wanaque Reservoir, 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.
Ask about Wanaque Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
1,971 acres
Shoreline
21.6 mi
No bathymetric survey has been published for Wanaque Reservoir, so its depth is not documented here.
Stays via Stay22
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Fishing Wanaque Reservoir
EPA Impairment Status
Wanaque Reservoir 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, Fish consumption, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NJ02030103070050-01 · Official waterbody report
Nearby Lakes in Passaic County
Frequently asked questions about Wanaque Reservoir
Where is Wanaque Reservoir?
- Wanaque Reservoir is a lake in Passaic County, New Jersey. Its water-quality measurements are published by NJDEP and shown on this page as reported.
What is the water quality of Wanaque Reservoir?
- Wanaque Reservoir in Passaic County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Surface area: 1971 acres.
Is Wanaque Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Wanaque Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, metals (other than mercury), pathogens (E. coli, fecal). Check local advisories before you swim.
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Where this data comes from
Measurements for Wanaque Reservoir 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