Long Pond is a lake in Plymouth County, Massachusetts. Its water-quality measurements are published by MassDEP and shown on this page as reported.

Long Pond

Plymouth County, Massachusetts32 acresView map Directions

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

Area

32 acres

Surface area

Impaired · Mercury

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Long Pond in Plymouth County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Surface area: 32 acres.

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Long Pond is a 32-acre lake in Plymouth County, Massachusetts.

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

Swimming conditions

No reading

Not rated

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

Whether Long Pond is safe to swim in today is a call for the Massachusetts Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Long Pond

These are the measurements MassDEP publishes for Long Pond, 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 Long Pond

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

Lake Details

Surface area

32 acres

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

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Stays near Long Pond

Compare lakeside cabins, hotels, and vacation rentals near Long Pond in Plymouth County, Massachusetts — 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 Long Pond

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Fishing Long Pond

→ Long Pond fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Long Pond is officially listed as impaired under Clean Water Act §303(d) in the 2022 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 MA95097 · Official waterbody report

Nearby Lakes in Plymouth County

Snows Pond18.6 ft clear0.6 miView →Snipatuit Pond0.6 miView →Great Quittacas Pond3 miView →Leonards Pond2.8 miView →Little Quittacas Pond3.5 miView →Marys PondMesotrophic3.5 miView →

Frequently asked questions about Long Pond

Where is Long Pond?: Long Pond is a lake in Plymouth County, Massachusetts. Its water-quality measurements are published by MassDEP and shown on this page as reported.
What is the water quality of Long Pond?: Long Pond in Plymouth County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Surface area: 32 acres.
Is Long Pond safe to swim in?: Nutrient and algae readings are not a swimming clearance. Long Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.