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

How deep is Moon Lake?

Moon Lake has a maximum depth of 20 feet. The lake covers 261 acres.

Moon Lake

Jefferson County, New York261 acresView map Directions

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

Max depth

20 ft

Bathymetric survey

Area

261 acres

Surface area

Shoreline

5.3 mi

Measured length

Impaired · Nutrients (phosphorus, nitrogen)
20 ft max depth

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Moon Lake in Jefferson County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 20 ft. Surface area: 261 acres.

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Moon Lake is a 261-acre lake in Jefferson County, New York with a maximum depth of 20 feet.

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. Moon Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.

Whether Moon 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 Moon Lake

These are the measurements NY DEC publishes for Moon 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 Moon Lake

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

Lake Details

Max depth

20 ft

Surface area

261 acres

Shoreline

5.3 mi

Stays via Stay22

Stays near Moon Lake

Compare lakeside cabins, hotels, and vacation rentals near Moon Lake in Jefferson 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.

Top-rated places to stay near Moon Lake

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Fishing Moon Lake

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

EPA Impairment Status

Moon Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).

Causes of impairment

Nutrients (phosphorus, nitrogen)

Designated uses not supporting: Recreation.

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit NY0905-0093 · Official waterbody report

Nearby Lakes in Jefferson County

Red Lake1.2 miView →Sixberry Lake2.4 miView →Millsite Lake27.9 ft clear3.1 miView →Crystal Lake3.1 miView →Lake of the Woods4.4 miView →Muskellunge Lake3.9 miView →

Frequently asked questions about Moon Lake

Where is Moon Lake?: Moon Lake is a lake in Jefferson 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 Moon Lake?: Moon Lake in Jefferson County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 20 ft. Surface area: 261 acres.
Is Moon Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Moon Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Moon Lake?: Moon Lake has a maximum depth of 20 feet. The lake covers 261 acres.