Where is Lake Denison?

Lake Denison 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 Lake Denison?

Lake Denison has a maximum depth of 15 feet. The lake covers 84 acres.

Are there campgrounds on Lake Denison?

Lake Denison has 1 public campground from USGS The National Map within 5 km, including Lake Dennison Recreation Area Campground. 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.

Lake Denison

Worcester County, Massachusetts84 acresView map Directions

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

Max depth

15 ft

Bathymetric survey

Area

84 acres

Surface area

Shoreline

1.8 mi

Measured length

Impaired · Mercury
15 ft max depth

See the measurements Directions Where to stay

Lake Denison in Worcester County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Maximum depth: 15 ft. Surface area: 84 acres.

Loading map…

Lake Denison is a 84-acre lake in Worcester County, Massachusetts with a maximum depth of 15 feet.

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

What Lake Denison is good for

From access and monitoring records, not editorial picks.

Camping1 public campground nearby

Swimming conditions

No reading

Bacteria advisory

Nutrient and algae readings are not a swimming clearance. Lake Denison is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, oxygen depletion (low DO), pathogens (E. coli, fecal). Check local advisories before you swim.

Whether Lake Denison 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.

Compare swimming lakes near Albany →

Get alerts for Lake Denison →

Water quality measurements for Lake Denison

These are the measurements MassDEP publishes for Lake Denison, 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 Lake Denison

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

Lake Details

Max depth

15 ft

Surface area

84 acres

Shoreline

1.8 mi

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

Recreation & Access

Campgrounds

Public campgrounds near Lake Denison

Lake Dennison Recreation Area Campground0.8 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 Lake Denison

Compare lakeside cabins, hotels, and vacation rentals near Lake Denison 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 Lake Denison

Prices for Oct 16–18, 4 adults. Change dates on the map below.

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Planning a whole trip? See where to stay at Massachusetts’s top lakes →

Follow Lake Denison’s readings

Email me when new measurements post for this lake. Updates stay free.

Or email

Fishing Lake Denison

→ Lake Denison fishing regulations (limits, seasons, special rules)

EPA Impairment Status

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

Causes of impairment

MercuryOxygen depletion (low DO)Pathogens (E. coli, fecal)

Designated uses not supporting: Aquatic life, Fish consumption, Recreation.

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

Source: EPA ATTAINS assessment unit MA35017 · Official waterbody report

Nearby Lakes in Worcester County

Stoddard Pond1.6 miView →Beaver Pond2.1 miView →Bourn-Hadley Pond6.2 miView →Perley Brook Reservoir5.5 miView →Parker Pond5.9 miView →Whites Mill Pond5.6 miView →

Frequently asked questions about Lake Denison

Where is Lake Denison?: Lake Denison 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 Lake Denison?: Lake Denison in Worcester County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Maximum depth: 15 ft. Surface area: 84 acres.
Is Lake Denison safe to swim in?: Nutrient and algae readings are not a swimming clearance. Lake Denison is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, oxygen depletion (low DO), pathogens (E. coli, fecal). Check local advisories before you swim.
How deep is Lake Denison?: Lake Denison has a maximum depth of 15 feet. The lake covers 84 acres.
Are there campgrounds on Lake Denison?: Lake Denison has 1 public campground from USGS The National Map within 5 km, including Lake Dennison Recreation Area Campground. 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.