Where is Neponset Reservoir?

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

Neponset Reservoir

Norfolk County, Massachusetts323 acresView map Directions

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

Area

323 acres

Surface area

Shoreline

8.3 mi

Measured length

Impaired · Algal growth

See the measurements Directions Where to stay

Neponset Reservoir in Norfolk County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Surface area: 323 acres.

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Neponset Reservoir is a 323-acre lake in Norfolk County, Massachusetts.

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

Swimming conditions

No reading

Recreation use not supported

Nutrient and algae readings are not a swimming clearance. Neponset Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, turbidity. Check local advisories before you swim.

Whether Neponset Reservoir 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 Neponset Reservoir

These are the measurements MassDEP publishes for Neponset Reservoir, 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 Neponset Reservoir

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

Lake Details

Surface area

323 acres

Shoreline

8.3 mi

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

Stays via Stay22

Stays near Neponset Reservoir

Compare lakeside cabins, hotels, and vacation rentals near Neponset Reservoir in Norfolk 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 Neponset Reservoir

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Fishing Neponset Reservoir

→ Neponset Reservoir fishing regulations (limits, seasons, special rules)

EPA Impairment Status

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

Causes of impairment

Algal growthTurbidity

Designated uses not supporting: Aquatic life, Recreation, Other.

Source: EPA ATTAINS assessment unit MA73034 · Official waterbody report

Nearby Lakes in Norfolk County

Cocasset Lake2.1 miView →Lakeview Pond1.9 miView →Massapoag Lake3.3 miView →Lake Mirimichi4.9 miView →Kingfisher Pond4.5 miView →Mirror Lake4.5 miView →

Frequently asked questions about Neponset Reservoir

Where is Neponset Reservoir?: Neponset Reservoir is a lake in Norfolk County, Massachusetts. Its water-quality measurements are published by MassDEP and shown on this page as reported.
What is the water quality of Neponset Reservoir?: Neponset Reservoir in Norfolk County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Surface area: 323 acres.
Is Neponset Reservoir safe to swim in?: Nutrient and algae readings are not a swimming clearance. Neponset Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, turbidity. Check local advisories before you swim.