Where is DeForest Lake?

DeForest Lake is a lake in Rockland County, New York. Its water-quality measurements are published by NY DEC and shown on this page as reported.

DeForest Lake

Rockland County, New York745 acresView map Directions

No nutrient or algae sampling on record from NY DEC for this lake.

Area

745 acres

Surface area

Shoreline

8.4 mi

Measured length

Impaired · Nutrients (phosphorus, nitrogen)

See the measurements Directions Where to stay

DeForest Lake in Rockland County, New York has water-quality measurements published by NY DEC, shown here as reported. Surface area: 745 acres.

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DeForest Lake is a 745-acre lake in Rockland County, New York.

Source: EPA Water Quality Portal sampling records, NYSDEC. Methodology: how these readings are compared.

Swimming conditions

No reading

Recreation use not supported

Nutrient and algae readings are not a swimming clearance. DeForest Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), oxygen depletion (low DO). Check local advisories before you swim.

Whether DeForest Lake is safe to swim in today is a call for the New York Department of Environmental Conservation and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for DeForest Lake

These are the measurements NY DEC publishes for DeForest 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 DeForest Lake

Answers come straight from the public measurements and survey records on this page.

Lake Details

Surface area

745 acres

Shoreline

8.4 mi

No bathymetric survey has been published for DeForest Lake, so its depth is not documented here.

Stays via Stay22

Stays near DeForest Lake

Compare lakeside cabins, hotels, and vacation rentals near DeForest Lake in Rockland County, New York — 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.

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Fishing DeForest Lake

→ DeForest Lake fishing regulations (limits, seasons, special rules)

EPA Impairment Status

DeForest Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).

Causes of impairment

Nutrients (phosphorus, nitrogen)Oxygen depletion (low DO)

Designated uses not supporting: Aquatic life, Recreation.

Source: EPA ATTAINS assessment unit NY1501-0007 · Official waterbody report

Nearby Lakes in Rockland County

Congers Lake1.3 miView →DeForest Lake2.1 miView →Swartwont Lake2.1 miView →Rockland Lake2.1 miView →Lake Lucille2.3 ft clear4.1 miView →Tomkins Lake5.4 ft clear—View →

Frequently asked questions about DeForest Lake

Where is DeForest Lake?: DeForest Lake is a lake in Rockland County, New York. Its water-quality measurements are published by NY DEC and shown on this page as reported.
What is the water quality of DeForest Lake?: DeForest Lake in Rockland County, New York has water-quality measurements published by NY DEC, shown here as reported. Surface area: 745 acres.
Is DeForest Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. DeForest Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), oxygen depletion (low DO). Check local advisories before you swim.