Ramapo Lake
Passaic County, New Jersey95 acresView mapDirections
No nutrient or algae sampling on record from NJDEP for this lake.
- Impaired · Impaired biota (cause unknown)
Ramapo Lake in Passaic County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Surface area: 95 acres.
Ramapo Lake is a 95-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. Ramapo 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), pesticides, pH / acidity, pCBs. Check local advisories before you swim.
Whether Ramapo 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 Ramapo Lake
These are the measurements NJDEP publishes for Ramapo 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.
Ask about Ramapo Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
95 acres
Shoreline
3.5 mi
No bathymetric survey has been published for Ramapo Lake, so its depth is not documented here.
Stays via Stay22
Stays near Ramapo Lake
Compare lakeside cabins, hotels, and vacation rentals near Ramapo Lake in Passaic County, New Jersey — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Ramapo Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Follow Ramapo Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Ramapo Lake
EPA Impairment Status
Ramapo 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.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NJ02030103100070-01 · Official waterbody report
Nearby Lakes in Passaic County
Frequently asked questions about Ramapo Lake
Where is Ramapo Lake?
- Ramapo Lake 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 Ramapo Lake?
- Ramapo Lake in Passaic County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Surface area: 95 acres.
Is Ramapo Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Ramapo 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), pesticides, pH / acidity, pCBs. Check local advisories before you swim.
Explore Ramapo Lake across LakeQuality
More lakes in New Jersey
Other Lakes in New Jersey
Where this data comes from
Measurements for Ramapo 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