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

Lower Connecticut River Valley County Lake Quality

Connecticut, 27 lakes, measured by CT DEEP

There are 27 monitored lakes in Lower Connecticut River Valley County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. The 27 monitored lakes in Lower Connecticut River Valley 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 Lower Connecticut River Valley County

Top-rated places to stay near Lower Connecticut River Valley County

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Quick Answers for Lower Connecticut River Valley County

Cleanest lakes in Lower Connecticut River Valley County →Best swimming lakes in Connecticut →

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

All Lakes in Lower Connecticut River Valley County

27 lakes · 0 ranked on readings, 27 without enough sampling0 lakes ranked on readings · 27 without enough sampling, hidden

#LakeClarityPhosphorusAlgaeTrophicMax DepthAccess
Adder ReservoirLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Bushy Hill PondLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Cedar LakeLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Chapman PondLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Chapmans PondLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Crystal LakeLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samples27 ft✓ Public
Deer LakeLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Dooley PondLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Foster PondLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Great Hill PondLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samples10 ftNot recorded
Hidden LakeLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samples8.9 ftNot recorded
Higganum ReservoirLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samples33 ftNot recorded
Jobs PondLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Killingworth ReservoirLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Laurel Brook ReservoirLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Messerschmidt PondLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samples16 ftNot recorded
Mill PondLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Millers PondLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samples20 ftNot recorded
Moodus ReservoirLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samples8 ft✓ Public
Mount Higby ReservoirLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Pecausett PondLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Pocotopaug LakeLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samples38 ftNot recorded
Portland ReservoirLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Tower Hill LakeLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Turkey Hill ReservoirLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Waterhouse PondLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Worthington PondLower Connecticut River ValleyNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot 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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Other Counties in Connecticut

Tolland County

13 lakes

New Haven County

6 lakes

Middlesex County

9 lakes

Litchfield County

21 lakes

New London County

19 lakes

Fairfield County

9 lakes

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.