Lake Manalapan
Middlesex County, New Jersey52 acresView mapDirections
No nutrient or algae sampling on record from NJDEP for this lake.
- Impaired · Nutrients (phosphorus, nitrogen)
Lake Manalapan in Middlesex County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Surface area: 52 acres.
Lake Manalapan is a 52-acre lake in Middlesex 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. Lake Manalapan is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), pathogens (E. coli, fecal), pesticides, pCBs. Check local advisories before you swim.
Whether Lake Manalapan 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 Lake Manalapan
These are the measurements NJDEP publishes for Lake Manalapan, 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 Lake Manalapan
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
52 acres
Shoreline
2.1 mi
No bathymetric survey has been published for Lake Manalapan, so its depth is not documented here.
Stays via Stay22
Stays near Lake Manalapan
Compare lakeside cabins, hotels, and vacation rentals near Lake Manalapan in Middlesex 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 Lake Manalapan
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 Lake Manalapan’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Lake Manalapan
EPA Impairment Status
Lake Manalapan 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, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NJ02030105140020-01 · Official waterbody report
Nearby Lakes in Middlesex County
Frequently asked questions about Lake Manalapan
Where is Lake Manalapan?
- Lake Manalapan is a lake in Middlesex County, New Jersey. Its water-quality measurements are published by NJDEP and shown on this page as reported.
What is the water quality of Lake Manalapan?
- Lake Manalapan in Middlesex County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Surface area: 52 acres.
Is Lake Manalapan safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Manalapan is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), pathogens (E. coli, fecal), pesticides, pCBs. Check local advisories before you swim.
Explore Lake Manalapan across LakeQuality
More lakes in New Jersey
Other Lakes in New Jersey
Where this data comes from
Measurements for Lake Manalapan 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