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

Litchfield County Lake Quality

Connecticut, 21 lakes, measured by CT DEEP

There are 21 monitored lakes in Litchfield County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. 11 of those lakes carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. For Litchfield County the spread behind the average matters more than the average itself: a few nutrient-rich lakes among many clear ones produce the same figure as the inverse.

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. Crystal Lake has the lowest nutrient and algae readings in the county.

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

All Lakes in Litchfield County

21 lakes · 11 ranked on readings, 10 without enough sampling11 lakes ranked on readings · 10 without enough sampling, hidden

Include not-rated lakes (10)

#	Lake	Clarity	Phosphorus	Algae	Trophic	Access
1	Crystal LakeLitchfield	No recent samples	9 µg/L	1.4 µg/L	No recent samples	Not recorded
2	East Twin LakeLitchfield	No recent samples	10 µg/L	2.4 µg/L	No recent samples	Not recorded
3	Tobey PondLitchfield	No recent samples	8 µg/L	0.5 µg/L	No recent samples	Not recorded
4	West Hill PondLitchfield	No recent samples	9 µg/L	1.6 µg/L	No recent samples	Not recorded
5	Wononpakook LakeLitchfield	No recent samples	15 µg/L	3.3 µg/L	No recent samples	Not recorded
6	Highland LakeLitchfield	No recent samples	17 µg/L	2.3 µg/L	No recent samples	✓ Public
7	Lake WaramaugLitchfield	No recent samples	23 µg/L	10.9 µg/L	No recent samples	Not recorded
8	Mohawk PondLitchfield	No recent samples	17 µg/L	2.4 µg/L	No recent samples	✓ Public
9	Wononscopomuc LakeLitchfield	No recent samples	17 µg/L	1.9 µg/L	No recent samples	Not recorded
10	Woodridge LakeLitchfield	No recent samples	18 µg/L	4.2 µg/L	No recent samples	✓ Public
11	Mount Tom PondLitchfield	No recent samples	31 µg/L	5.5 µg/L	No recent samples	Not recorded
	Bantam LakeLitchfield	6.1 ft	No recent samples	No recent samples	No recent samples	Not recorded
	Lake LillinonahLitchfield	8.3 ft	No recent samples	No recent samples	No recent samples	✓ Public
	Lake PlymouthLitchfield	3.5 ft	No recent samples	No recent samples	No recent samples	Not recorded
	Lake WinchesterLitchfield	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	Laurel LakeLitchfield	18.7 ft	No recent samples	No recent samples	No recent samples	Not recorded
	Long Meadow PondLitchfield	6 ft	No recent samples	No recent samples	No recent samples	Not recorded
	Mudge PondLitchfield	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	Washinee LakeLitchfield	11.5 ft	No recent samples	No recent samples	No recent samples	Not recorded
	Washining LakeLitchfield	15.5 ft	No recent samples	No recent samples	No recent samples	Not recorded
	Wononskopomuc LakeLitchfield	15.8 ft	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.