Lake Lefferts
Monmouth County, New Jersey75 acresView mapDirections
No nutrient or algae sampling on record from NJDEP for this lake.
- Impaired · Impaired biota (cause unknown)
- 12 ft max depth
Lake Lefferts in Monmouth County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Maximum depth: 12 ft. Surface area: 75 acres.
Lake Lefferts is a 75-acre lake in Monmouth County, New Jersey with a maximum depth of 12 feet (5-foot average).
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. Lake Lefferts is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown), metals (other than mercury), pCBs. Check local advisories before you swim.
Whether Lake Lefferts 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 Lefferts
These are the measurements NJDEP publishes for Lake Lefferts, 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 Lefferts
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
12 ft
Average depth
5.2 ft
Surface area
75 acres
Shoreline
3.9 mi
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Fishing Lake Lefferts
EPA Impairment Status
Lake Lefferts 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 NJ02030104060020-01 · Official waterbody report
Nearby Lakes in Monmouth County
Frequently asked questions about Lake Lefferts
Where is Lake Lefferts?
- Lake Lefferts is a lake in Monmouth 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 Lefferts?
- Lake Lefferts in Monmouth County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Maximum depth: 12 ft. Surface area: 75 acres.
Is Lake Lefferts safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Lefferts is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown), metals (other than mercury), pCBs. Check local advisories before you swim.
How deep is Lake Lefferts?
- Lake Lefferts has a maximum depth of 12 feet and an average depth of 5.2 feet. The lake covers 75 acres.
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Where this data comes from
Measurements for Lake Lefferts 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