Where is Upper Reservoir?

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

Upper Reservoir

Worcester County, Massachusetts42 acresView map Directions

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

Area

42 acres

Surface area

Shoreline

1.4 mi

Measured length

Impaired · Mercury

See the measurements Directions Where to stay

Upper Reservoir in Worcester County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Surface area: 42 acres.

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Upper Reservoir is a 42-acre lake in Worcester 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. Upper Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.

Whether Upper 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 Upper Reservoir

These are the measurements MassDEP publishes for Upper 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 Upper Reservoir

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

Lake Details

Surface area

42 acres

Shoreline

1.4 mi

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

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Stays near Upper Reservoir

Compare lakeside cabins, hotels, and vacation rentals near Upper 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.

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Fishing Upper Reservoir

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

EPA Impairment Status

Upper Reservoir 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 MA35091 · Official waterbody report

Nearby Lakes in Worcester County

Wrights ReservoirMesotrophic0.9 miView →Greenwood Pond1.5 miView →Partridge Pond1.3 miView →Waite Pond1.7 miView →Lovewell Pond1.8 miView →Bents Pond1.8 miView →

Frequently asked questions about Upper Reservoir

Where is Upper Reservoir?: Upper 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 Upper Reservoir?: Upper Reservoir in Worcester County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Surface area: 42 acres.
Is Upper Reservoir safe to swim in?: Nutrient and algae readings are not a swimming clearance. Upper Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.