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

Northeastern Connecticut County Lake Quality

Connecticut, 44 lakes, measured by CT DEEP

The county-level average smooths over real differences — a single agricultural watershed near the southwest corner can pull the average down even if the rest of the county runs clean. The 44 monitored lakes in Northeastern 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 Northeastern Connecticut County

Top-rated places to stay near Northeastern Connecticut County

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Quick Answers for Northeastern Connecticut County

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

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

All Lakes in Northeastern Connecticut County

44 lakes · 0 ranked on readings, 44 without enough sampling0 lakes ranked on readings · 44 without enough sampling, hidden

Include not-rated lakes (44)

Lake	Clarity	Phosphorus	Algae	Trophic	Max Depth	Access
Abbott PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Acme PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Bailey PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Beachdale PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	10 ft	✓ Public
Black Spruce PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Bog Meadow ReservoirNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Chamberlain PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Chase ReservoirNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Corbin Wildlife MarshNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Crystal PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	44 ft	Not recorded
Eddy Pray ReservoirNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Fivemile PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Green Fall PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	26 ft	Not recorded
Griggs PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Hampton ReservoirNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	8 ft	Not recorded
Happy Acres PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Hatchet PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Hazard PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Hell Hollow PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Keach PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Killingly PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	22 ft	Not recorded
Knowlton PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Lake AlbertNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Leander PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Lisbon PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Little PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	14 ft	✓ Public
Middle ReservoirNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Moore PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Moosup PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	22 ft	Not recorded
Muddy PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Nightingale PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
North Grosvenordale PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Paradise LakeNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Pine Acres LakeNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
Poole PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Quaddick ReservoirNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Quinebaug PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	30 ft	Not recorded
Reams PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Ross Management Area PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Ross PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Stump PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Tetreault PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Wappaquasset PondNortheastern Connecticut	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
Witches Woods LakeNortheastern 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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Browse every Connecticut lake, or the full directory of lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..

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