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

Suffolk County Lake Quality

New York, 46 lakes, measured by NY DEC

There are 46 monitored lakes in Suffolk County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. The 46 monitored lakes in Suffolk County carry whatever clarity, phosphorus, and chlorophyll-a readings NY DEC 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 Suffolk County

Top-rated places to stay near Suffolk County

Prices for Oct 23–25, 4 adults. Change dates on the map below.

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Quick Answers for Suffolk County

Cleanest lakes in Suffolk County →Cleanest lakes in New York →Best swimming lakes in New York →

Planning a trip? Check special fishing regulations for Fresh Pond — or check the official New York fishing regulations.

All Lakes in Suffolk County

46 lakes · 0 ranked on readings, 46 without enough sampling0 lakes ranked on readings · 46 without enough sampling, hidden

#LakeClarityPhosphorusAlgaeTrophicMax DepthAccess
Fresh PondSuffolk6.5 ftNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Long PondSuffolk4 ftNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Big Fresh PondSuffolk7.5 ftNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Little Fresh PondSuffolk3.8 ftNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Little Long PondSuffolk10 ftNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Middle Farms PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Beach PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Big Reed PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samples6 ftNot recorded
Oyster PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lake MontaukSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Fort PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samples27 ft✓ Public
Fresh PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Great PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Tobaccolot PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Home PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Marion LakeSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Dam PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Gardiners CreekSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Great PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Hashamomuck PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Laurel LakeSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samples42.7 ftNot recorded
Flax PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Mill PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
New MillpondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samples6 ftNot recorded
Belmont LakeSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samples4 ftNot recorded
Southards PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lake RonkonkomaSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samples65 ft✓ Public
Artist LakeSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lower LakeSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samples6.9 ftNot recorded
Lake PanamokaSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samples7.9 ftNot recorded
Deep PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samples40 ftNot recorded
Swan PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samples6 ftNot recorded
Wildwood LakeSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samples47 ftNot recorded
Peconic LakeSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Red Creek PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Scallop PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Agawan LakeSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Channel PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Mill PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Long PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Kellis PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Poxabogue PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samples4 ftNot recorded
Georgica PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samples6 ftNot recorded
Wainscott PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Sagaponack PondSuffolkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Hook PondSuffolkNo 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 New York

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Browse every New York 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 New York Department of Environmental Conservation. See data sources.