Somerset Reservoir
Windham County, Vermont1,514 acresView mapDirections
No nutrient or algae sampling on record from Vermont DEC for this lake.
- Impaired · Mercury
- 141 ft max depth
- Limited data
Somerset Reservoir in Windham County, Vermont has water-quality measurements published by Vermont DEC, shown here as reported. Surface area: 1514 acres.
Somerset Reservoir is a 1,514-acre lake in Windham County, Vermont with an estimated average depth of about 141 feet.
Source: EPA Water Quality Portal sampling records, VT DEC, last sampled 2024-05-01. Methodology: how these readings are compared.
Somerset Reservoir covers about 1,500 acres in Windham County. Vrbo is where to look for cabins and lake homes around Somerset Reservoir, and Booking.com and Expedia search hotels near the lake for your dates.
What Somerset Reservoir is good for
From access and monitoring records, not editorial picks.
- Camping1 public campground nearby
- Big water1,514 acres
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Somerset Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, pH / acidity. Check local advisories before you swim.
Whether Somerset Reservoir is safe to swim in today is a call for the Vermont Department of Environmental Conservation and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Somerset Reservoir
These are the measurements Vermont DEC publishes for Somerset 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.
Ask about Somerset Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~141 ft est.
Surface area
1,514 acres
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Vermont has not published bathymetry for Somerset Reservoir.
Lake Size & Watershed
Watershed (drainage) area
26 sq mi
HydroLAKES / HydroSHEDS
Shoreline
12 mi
HydroLAKES / HydroSHEDS
Elevation
2,113 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
Public campgrounds near Somerset Reservoir
- Somerset Airfield4.3 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Stays via Stay22
Stays near Somerset Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Somerset Reservoir in Windham County, Vermont — 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 Somerset Reservoir
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Fishing Somerset Reservoir
Reservoir Info (USACE NID)
Somerset Reservoir is a man-made reservoir impounded by the Somerset (completed 1913), built primarily for hydroelectric on the East Branch Deerfield River; other-type dam, 110 ft tall and 2,101 ft long.
- Surface area
- 1,514 ac
- Normal storage
- 35,517 ac-ft
- Max storage
- 57,345 ac-ft
- Drainage area
- 30 sq mi
- Hazard class
- High
- Owner
- Great River Hydro, LLC
All listed purposes: Hydroelectric;Recreation.
Source: USACE National Inventory of Dams, NID ID VT00018 · Operator website
EPA Impairment Status
Somerset Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Aquatic life, Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit VT12-03L02 · Official waterbody report
Nearby Lakes in Windham County
Frequently asked questions about Somerset Reservoir
Where is Somerset Reservoir?
- Somerset Reservoir is a lake in Windham County, Vermont. Its water-quality measurements are published by Vermont DEC and shown on this page as reported.
What is the water quality of Somerset Reservoir?
- Somerset Reservoir in Windham County, Vermont has water-quality measurements published by Vermont DEC, shown here as reported. Surface area: 1514 acres.
Is Somerset Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Somerset Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, pH / acidity. Check local advisories before you swim.
How deep is Somerset Reservoir?
- No published bathymetric survey covers Somerset Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 141 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 1514 acres.
Are there campgrounds on Somerset Reservoir?
- Somerset Reservoir has 1 public campground from USGS The National Map within 5 km, including Somerset Airfield. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
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Where this data comes from
5 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Vermont Dept of Environmental Conservation
1VTDECWQ5 samples · 2024
Analytical methods
- EPA approved Alternate Test Procedure for 4500 P H. Has a 28 day hold without acid preservation.
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- 2130 B ~ Nephelometric Method
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Public campgrounds from USGS The National Map Structures, within about 3 miles