Monksville Reservoir
Passaic County, New Jersey512 acresView mapDirections
No nutrient or algae sampling on record from NJDEP for this lake.
- Impaired · Mercury
Monksville Reservoir in Passaic County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Surface area: 512 acres.
Monksville Reservoir is a 512-acre lake in Passaic County, New Jersey.
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Monksville Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pH / acidity, temperature. Check local advisories before you swim.
Whether Monksville 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 Monksville Reservoir
These are the measurements NJDEP publishes for Monksville 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 Monksville Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
512 acres
Shoreline
9.2 mi
No bathymetric survey has been published for Monksville Reservoir, so its depth is not documented here.
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Fishing Monksville Reservoir
EPA Impairment Status
Monksville 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: Aquatic life, Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NJ02030103070030-01 · Official waterbody report
Nearby Lakes in Passaic County
Frequently asked questions about Monksville Reservoir
Where is Monksville Reservoir?
- Monksville 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 Monksville Reservoir?
- Monksville Reservoir in Passaic County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Surface area: 512 acres.
Is Monksville Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Monksville Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pH / acidity, temperature. Check local advisories before you swim.
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Where this data comes from
Measurements for Monksville 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