Middle Reservoir
Middlesex County, Massachusetts56 acresView mapDirections
No nutrient or algae sampling on record from MassDEP for this lake.
Middle Reservoir in Middlesex County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Surface area: 56 acres.
Middle Reservoir is a 56-acre lake in Middlesex County, Massachusetts.
Source: EPA Water Quality Portal sampling records, MassDEP. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Middle 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.
Water quality measurements for Middle Reservoir
These are the measurements MassDEP publishes for Middle 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 Middle Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
56 acres
Shoreline
1.9 mi
No bathymetric survey has been published for Middle Reservoir, so its depth is not documented here.
Stays via Stay22
Stays near Middle Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Middle 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 Middle 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 whole trip? See where to stay at Massachusetts’s top lakes →
Follow Middle Reservoir’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Middle Reservoir
Nearby Lakes in Middlesex County
Frequently asked questions about Middle Reservoir
Where is Middle Reservoir?
- Middle 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 Middle Reservoir?
- Middle Reservoir in Middlesex County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Surface area: 56 acres.
Is Middle Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Middle Reservoir across LakeQuality
More lakes in Massachusetts
Other Lakes in Massachusetts
Where this data comes from
Measurements for Middle Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.