Lower Mystic Lake
Middlesex County, Massachusetts93 acresView mapDirections
No nutrient or algae sampling on record from MassDEP for this lake.
- Impaired · Oxygen depletion (low DO)
- 74 ft max depth
Lower Mystic Lake in Middlesex County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Maximum depth: 74 ft. Surface area: 93 acres.
Lower Mystic Lake is a 93-acre lake in Middlesex County, Massachusetts with a maximum depth of 74 feet.
Source: EPA Water Quality Portal sampling records, MassDEP. Methodology: how these readings are compared.
What Lower Mystic Lake is good for
From access and monitoring records, not editorial picks.
- Deep water74 ft surveyed max depth
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Lower Mystic Lake is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO), pesticides, pCBs, salinity / chlorides, total toxics, toxic inorganics. Check local advisories before you swim.
Whether Lower Mystic Lake 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 Lower Mystic Lake
These are the measurements MassDEP publishes for Lower Mystic Lake, 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 Lower Mystic Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
74 ft
Surface area
93 acres
Shoreline
1.8 mi
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Stays near Lower Mystic Lake
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Fishing Lower Mystic Lake
EPA Impairment Status
Lower Mystic Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life, Fish consumption.
Source: EPA ATTAINS assessment unit MA71027 · Official waterbody report
Nearby Lakes in Middlesex County
Frequently asked questions about Lower Mystic Lake
Where is Lower Mystic Lake?
- Lower Mystic Lake 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 Lower Mystic Lake?
- Lower Mystic Lake in Middlesex County, Massachusetts has water-quality measurements published by MassDEP, shown here as reported. Maximum depth: 74 ft. Surface area: 93 acres.
Is Lower Mystic Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lower Mystic Lake is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO), pesticides, pCBs, salinity / chlorides, total toxics, toxic inorganics. Check local advisories before you swim.
How deep is Lower Mystic Lake?
- Lower Mystic Lake has a maximum depth of 74 feet. The lake covers 93 acres.
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Where this data comes from
Measurements for Lower Mystic Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database