Where is Sudbury Reservoir?

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

How deep is Sudbury Reservoir?

Sudbury Reservoir has a maximum depth of 55 feet. The lake covers 909 acres.

Sudbury Reservoir

Worcester County, Massachusetts909 acresView map Directions

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

Max depth

55 ft

Bathymetric survey

Area

909 acres

Surface area

Shoreline

16.2 mi

Measured length

Impaired · Mercury
55 ft max depth

See the measurements Directions Where to stay

Sudbury Reservoir in Worcester County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Maximum depth: 55 ft. Surface area: 909 acres.

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Sudbury Reservoir is a 909-acre lake in Worcester County, Massachusetts with a maximum depth of 55 feet.

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

What Sudbury Reservoir is good for

From access and monitoring records, not editorial picks.

Deep water55 ft surveyed max depth

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Sudbury Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, noxious aquatic plants, nuisance exotic species. Check local advisories before you swim.

Whether Sudbury 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 Sudbury Reservoir

These are the measurements MassDEP publishes for Sudbury 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 Sudbury Reservoir

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

Lake Details

Max depth

55 ft

Surface area

909 acres

Shoreline

16.2 mi

The depth above comes from a bathymetric survey of this lake, not from a regional estimate.

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Stays near Sudbury Reservoir

Compare lakeside cabins, hotels, and vacation rentals near Sudbury Reservoir in Worcester 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 Sudbury Reservoir

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Fishing Sudbury Reservoir

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

EPA Impairment Status

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

Causes of impairment

MercuryNoxious aquatic plantsNuisance exotic species

Designated uses not supporting: Aquatic life, Fish consumption.

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

Source: EPA ATTAINS assessment unit MA82106 · Official waterbody report

Nearby Lakes in Worcester County

Sudbury ReservoirOligotrophic1.5 miView →Chauncy Lake—View →Little Chauncy PondEutrophic—View →Bartlett PondHypereutrophic—View →Gates Pond—View →Westboro Reservoir—View →

Frequently asked questions about Sudbury Reservoir

Where is Sudbury Reservoir?: Sudbury Reservoir is a lake in Worcester County, Massachusetts. Its water-quality measurements are published by MassDEP and shown on this page as reported.
What is the water quality of Sudbury Reservoir?: Sudbury Reservoir in Worcester County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Maximum depth: 55 ft. Surface area: 909 acres.
Is Sudbury Reservoir safe to swim in?: Nutrient and algae readings are not a swimming clearance. Sudbury Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, noxious aquatic plants, nuisance exotic species. Check local advisories before you swim.
How deep is Sudbury Reservoir?: Sudbury Reservoir has a maximum depth of 55 feet. The lake covers 909 acres.