Where is Ashland Reservoir?

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

How deep is Ashland Reservoir?

Ashland Reservoir has a maximum depth of 48 feet and an average depth of 21 feet. The lake covers 168 acres.

Are there boat ramps on Ashland Reservoir?

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

Can I fish at Ashland Reservoir?

Ashland Reservoir 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.

Ashland Reservoir

Middlesex County, Massachusetts168 acresView map Directions

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

Max depth

48 ft

Bathymetric survey

Area

168 acres

Surface area

Shoreline

3.9 mi

Measured length

Impaired · Mercury
48 ft max depth
Public access

See the measurements Directions Where to stay

Ashland Reservoir in Middlesex County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Maximum depth: 48 ft. Surface area: 168 acres.

Loading map…

Ashland Reservoir is a 168-acre lake in Middlesex County, Massachusetts with a maximum depth of 48 feet (21-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 Ashland Reservoir is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Deep water48 ft surveyed max depth

Swimming conditions

No reading

Not rated

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

Whether Ashland 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.

Get alerts for Ashland Reservoir →

Water quality measurements for Ashland Reservoir

These are the measurements MassDEP publishes for Ashland 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 Ashland Reservoir

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

Lake Details

Max depth

48 ft

Average depth

21 ft

Surface area

168 acres

Shoreline

3.9 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

Ashland ReservoirPublic

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

Stays via Stay22

Stays near Ashland Reservoir

Compare lakeside cabins, hotels, and vacation rentals near Ashland Reservoir in Middlesex 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 Ashland Reservoir

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 Ashland Reservoir → · more Massachusetts lake trips

Follow Ashland Reservoir’s readings

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

Or email

Fishing Ashland Reservoir

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

EPA Impairment Status

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

Causes of impairment

MercuryNuisance 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 MA82003 · Official waterbody report

Nearby Lakes in Middlesex County

Bracket Reservoir (Number Two)2.6 miView →Waushakum Pond2.6 miView →Farm Pond3.5 miView →Foss Reservoir (Number Three)4.2 miView →Echo Lake4 miView →Lake Winthrop4.1 miView →

Frequently asked questions about Ashland Reservoir

Where is Ashland Reservoir?: Ashland Reservoir is a lake in Middlesex County, Massachusetts. Its water-quality measurements are published by MassDEP and shown on this page as reported.
What is the water quality of Ashland Reservoir?: Ashland Reservoir in Middlesex County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Maximum depth: 48 ft. Surface area: 168 acres.
Is Ashland Reservoir safe to swim in?: Nutrient and algae readings are not a swimming clearance. Ashland Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, nuisance exotic species. Check local advisories before you swim.
How deep is Ashland Reservoir?: Ashland Reservoir has a maximum depth of 48 feet and an average depth of 21 feet. The lake covers 168 acres.
Are there boat ramps on Ashland Reservoir?: Ashland Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Ashland Reservoir. Public access is listed as yes.
Can I fish at Ashland Reservoir?: Ashland Reservoir 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.