Alum Pond 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 Alum Pond?

Alum Pond has a maximum depth of 40 feet and an average depth of 23 feet. The lake covers 198 acres.

Are there boat ramps on Alum Pond?

Alum Pond has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Alum Pond. Public access is listed as yes.

Can I fish at Alum Pond?

Alum Pond has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Massachusetts's fish and wildlife agency, so check its current regulations before you go.

Alum Pond

Worcester County, Massachusetts198 acresView map Directions

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

Max depth

40 ft

Bathymetric survey

Area

198 acres

Surface area

Shoreline

3 mi

Measured length

Impaired · Oxygen depletion (low DO)
40 ft max depth
Public access

See the measurements Directions Where to stay

Alum Pond in Worcester County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Maximum depth: 40 ft. Surface area: 198 acres.

Loading map…

Alum Pond is a 198-acre lake in Worcester County, Massachusetts with a maximum depth of 40 feet (23-foot average). Limited fish-species data available. Public access is available with 1 public boat landing.

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

What Alum Pond is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Deep water40 ft surveyed max depth

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Alum Pond is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO). Check local advisories before you swim.

Whether Alum Pond 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 Alum Pond →

Water quality measurements for Alum Pond

These are the measurements MassDEP publishes for Alum Pond, 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 Alum Pond

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

Lake Details

Max depth

40 ft

Average depth

23 ft

Surface area

198 acres

Shoreline

3 mi

Public access

Yes

Listed by MassDEP

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

Recreation & Access

Boat Landings

Yes

Public Access

Alum PondPublic

Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps

Stays via Stay22

Stays near Alum Pond

Compare lakeside cabins, hotels, and vacation rentals near Alum Pond 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 Alum Pond

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 trip? Cabins and lodging at Alum Pond → · more Massachusetts lake trips

Follow Alum Pond’s readings

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

Or email

Fishing Alum Pond

→ Alum Pond fishing regulations (limits, seasons, special rules)

EPA Impairment Status

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

Causes of impairment

Oxygen depletion (low DO)

Designated uses not supporting: Aquatic life.

Source: EPA ATTAINS assessment unit MA41001 · Official waterbody report

Nearby Lakes in Worcester County

East Brimfield ReservoirMesotrophic1.6 miView →East Brimfield Lake2.4 miView →Cedar Pond2.1 miView →Rice Reservoir3.2 miView →Quacumquasit PondMesotrophic3.3 miView →Walker Pond3.1 miView →

Frequently asked questions about Alum Pond

Where is Alum Pond?: Alum Pond 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 Alum Pond?: Alum Pond in Worcester County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Maximum depth: 40 ft. Surface area: 198 acres.
Is Alum Pond safe to swim in?: Nutrient and algae readings are not a swimming clearance. Alum Pond is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO). Check local advisories before you swim.
How deep is Alum Pond?: Alum Pond has a maximum depth of 40 feet and an average depth of 23 feet. The lake covers 198 acres.
Are there boat ramps on Alum Pond?: Alum Pond has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Alum Pond. Public access is listed as yes.
Can I fish at Alum Pond?: Alum Pond has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Massachusetts's fish and wildlife agency, so check its current regulations before you go.