Pocotopaug Lake
Lower Connecticut River Valley County, Connecticut511 acresView mapDirections
No nutrient or algae sampling on record from CT DEEP for this lake.
- Impaired · Algal growth
- 38 ft max depth
Pocotopaug Lake in Lower Connecticut River Valley County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Maximum depth: 38 ft. Surface area: 511 acres.
Pocotopaug Lake is a 511-acre lake in Lower Connecticut River Valley County, Connecticut with a maximum depth of 38 feet (12-foot average).
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
What Pocotopaug Lake is good for
From access and monitoring records, not editorial picks.
- Deep water38 ft surveyed max depth
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Pocotopaug Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Pocotopaug Lake 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 Pocotopaug Lake
These are the measurements CT DEEP publishes for Pocotopaug 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 Pocotopaug Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
38 ft
Average depth
12.1 ft
Surface area
511 acres
Shoreline
5.1 mi
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Fishing Pocotopaug Lake
EPA Impairment Status
Pocotopaug 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: Recreation.
Source: EPA ATTAINS assessment unit CT4709-04-1-L1_01 · Official waterbody report
Nearby Lakes in Lower Connecticut River Valley County
Frequently asked questions about Pocotopaug Lake
Where is Pocotopaug Lake?
- Pocotopaug Lake is a lake in Lower Connecticut River Valley County, Connecticut. Its water-quality measurements are published by CT DEEP and shown on this page as reported.
What is the water quality of Pocotopaug Lake?
- Pocotopaug Lake in Lower Connecticut River Valley County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Maximum depth: 38 ft. Surface area: 511 acres.
Is Pocotopaug Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Pocotopaug Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Pocotopaug Lake?
- Pocotopaug Lake has a maximum depth of 38 feet and an average depth of 12.1 feet. The lake covers 511 acres.
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Where this data comes from
Measurements for Pocotopaug 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