Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water

Southeastern Connecticut County Lake Quality

Connecticut, 51 lakes, measured by CT DEEP

Southeastern Connecticut County has 51 monitored lakes, enough that within-county variation matters as much as the county average. Some are deep glacial basins, others are shallow agricultural-watershed waters, and the measurements reflect that mix. The 51 monitored lakes in Southeastern Connecticut County carry whatever clarity, phosphorus, and chlorophyll-a readings CT DEEP has published, shown as reported.

Most of the county's monitored lakes are shallow, under 50 feet, which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed.

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Where to stay near Southeastern Connecticut County

Top-rated places to stay near Southeastern Connecticut County

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Quick Answers for Southeastern Connecticut County

Cleanest lakes in Southeastern Connecticut County →Best swimming lakes in Connecticut →

Planning a trip? Check special fishing regulations for Ashland Pond — or check the official Connecticut fishing regulations.

All Lakes in Southeastern Connecticut County

51 lakes · 0 ranked on readings, 51 without enough sampling0 lakes ranked on readings · 51 without enough sampling, hidden

Include not-rated lakes (51)

Lake	Clarity	Phosphorus	Algae	Trophic	Max Depth	Access
Ashland PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Aspinook PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	22 ft	Not recorded
Babcock PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	8 ft	Not recorded
Barnes ReservoirSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Big PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Blissville PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Bog Meadow ReservoirSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Bogue Brook ReservoirSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Brandegee LakeSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Brewster PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Bride LakeSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Clayville PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Darrow PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Deep River ReservoirSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Dodge PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	51 ft	✓ Public
Fairview ReservoirSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Fairy LakeSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Fitchville PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	20 ft	Not recorded
Gagers PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Glasgo PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	21 ft	Not recorded
Gorton PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	10 ft	✓ Public
Goshen CoveSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Groton ReservoirSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Hopeville PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	16 ft	✓ Public
Lake KonomocSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Lake of IslesSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	10 ft	✓ Public
Ledyard ReservoirSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
McDonald PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Miller PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Morgan Pond ReservoirSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Oxoboxo LakeSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Papermill PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Pickerel LakeSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	10 ft	✓ Public
Pohegnut ReservoirSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Quanaduck CoveSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Red Cedar LakeSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	10 ft	Not recorded
Rosemond LakeSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Savin LakeSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Smith CoveSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Smith LakeSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Spalding PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	7.5 ft	Not recorded
Spencer PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Stone Hill ReservoirSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Stony Brook ReservoirSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Tadma PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Taftville ReservoirSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Trading Cove PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Versailles PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Wheeler PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Whitford PondSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Willimantic ReservoirSoutheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded

NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.

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Source: the Connecticut Department of Energy and Environmental Protection. See data sources.