Lake Mc Donough
Northwest Hills County, Connecticut386 acresView mapDirections
No nutrient or algae sampling on record from CT DEEP for this lake.
- Impaired · Mercury
- 55 ft max depth
Lake Mc Donough in Northwest Hills County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Maximum depth: 55 ft. Surface area: 386 acres.
Lake Mc Donough is a 386-acre lake in Northwest Hills County, Connecticut with a maximum depth of 55 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
What Lake Mc Donough is good for
From access and monitoring records, not editorial picks.
- Deep water55 ft surveyed max depth
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Lake Mc Donough is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Whether Lake Mc Donough is safe to swim in today is a call for the Connecticut Department of Energy and Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Mc Donough
These are the measurements CT DEEP publishes for Lake Mc Donough, 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 Mc Donough
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
55 ft
Surface area
386 acres
Shoreline
9.1 mi
The depth above comes from a bathymetric survey of this lake, not from a regional estimate.
Stays via Stay22
Stays near Lake Mc Donough
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Top-rated places to stay near Lake Mc Donough
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Fishing Lake Mc Donough
EPA Impairment Status
Lake Mc Donough 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: Fish consumption.
Source: EPA ATTAINS assessment unit CT4308-00-1-L2_01 · Official waterbody report
Nearby Lakes in Northwest Hills County
Frequently asked questions about Lake Mc Donough
Where is Lake Mc Donough?
- Lake Mc Donough is a lake in Northwest Hills County, Connecticut. Its water-quality measurements are published by CT DEEP and shown on this page as reported.
What is the water quality of Lake Mc Donough?
- Lake Mc Donough in Northwest Hills County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Maximum depth: 55 ft. Surface area: 386 acres.
Is Lake Mc Donough safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Mc Donough is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Lake Mc Donough?
- Lake Mc Donough has a maximum depth of 55 feet. The lake covers 386 acres.
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Where this data comes from
Measurements for Lake Mc Donough 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