Great Notch Reservoir
Passaic County, New Jersey31 acresView mapDirections
No nutrient or algae sampling on record from NJDEP for this lake.
- Impaired · Impaired biota (cause unknown)
Great Notch Reservoir in Passaic County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Surface area: 31 acres.
Great Notch Reservoir is a 31-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 readingBacteria advisory
Nutrient and algae readings are not a swimming clearance. Great Notch Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown), dioxins, mercury, metals (other than mercury), nutrients (phosphorus, nitrogen), pathogens (E. coli, fecal), pesticides, pCBs, salinity / chlorides. Check local advisories before you swim.
Whether Great Notch 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 Great Notch Reservoir
These are the measurements NJDEP publishes for Great Notch 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 Great Notch Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
31 acres
Shoreline
1.4 mi
No bathymetric survey has been published for Great Notch Reservoir, so its depth is not documented here.
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Fishing Great Notch Reservoir
EPA Impairment Status
Great Notch 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, Aquatic life, Fish consumption, Recreation.
Source: EPA ATTAINS assessment unit NJ02030103150010-01 · Official waterbody report
Nearby Lakes in Passaic County
Frequently asked questions about Great Notch Reservoir
Where is Great Notch Reservoir?
- Great Notch 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 Great Notch Reservoir?
- Great Notch Reservoir in Passaic County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Surface area: 31 acres.
Is Great Notch Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Great Notch Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown), dioxins, mercury, metals (other than mercury), nutrients (phosphorus, nitrogen), pathogens (E. coli, fecal), pesticides, pCBs, salinity / chlorides. Check local advisories before you swim.
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Where this data comes from
Measurements for Great Notch 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