Where is The Overflow?

The Overflow is a lake in Sullivan County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.

The Overflow

Sullivan County, New Hampshire58 acresView map Directions

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

Area

58 acres

Surface area

Shoreline

2.1 mi

Measured length

Impaired · Mercury

See the measurements Directions Where to stay

The Overflow in Sullivan County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Surface area: 58 acres.

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The Overflow is a 58-acre lake in Sullivan County, New Hampshire.

Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. The Overflow is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.

Whether The Overflow is safe to swim in today is a call for the New Hampshire Department of Environmental Services and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for The Overflow

These are the measurements NHDES publishes for The Overflow, 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 The Overflow

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

Lake Details

Surface area

58 acres

Shoreline

2.1 mi

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

Stays via Stay22

Stays near The Overflow

Compare lakeside cabins, hotels, and vacation rentals near The Overflow in Sullivan County, New Hampshire — 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 The Overflow

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Fishing The Overflow

→ The Overflow fishing regulations (limits, seasons, special rules)

EPA Impairment Status

The Overflow is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Mercury

Designated uses not supporting: Fish consumption.

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

Source: EPA ATTAINS assessment unit NHLAK801060405-02 · Official waterbody report

Nearby Lakes in Sullivan County

Perkins Pond-Deep SpotEutrophic1.4 miView →Perkins Pond-Burma1.6 miView →Spectacle Pond2.2 miView →Rockybound Pond-Deep SpotMesotrophic2.4 miView →Lake Coniston3 miView →Ledge Pond-Deep SpotMesotrophic3 miView →

Frequently asked questions about The Overflow

Where is The Overflow?: The Overflow is a lake in Sullivan County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of The Overflow?: The Overflow in Sullivan County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Surface area: 58 acres.
Is The Overflow safe to swim in?: Nutrient and algae readings are not a swimming clearance. The Overflow is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.