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

Orange County Lake Quality

New York, 61 lakes — no lake here has enough monitoring data for a grade

Orange County has 61 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. No lake in Orange County has enough sampling behind it for an A–F grade yet. The 61 monitored lakes below carry whatever clarity, phosphorus, and chlorophyll-a measurements exist.

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 Orange County

Top-rated places to stay near Orange County

Prices for Sep 11–13, 4 adults. Change dates on the map below.

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Quick Answers for Orange County

Cleanest lakes in Orange County →Cleanest lakes in New York →Safest swimming lakes in New York →

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

All Lakes in Orange County

61 lakes · 0 graded, 61 not rated0 graded lakes · 61 not rated, hidden

#LakeGradeClarityPhosphorusAlgaeTrophicAccess
NROrange LakeOrangeNR2.4 ftNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGreenwood LakeOrangeNR3.1 ftNo recent samplesNo recent samplesNo recent samplesNot recorded
NRQueensboro LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTurkey Hill PondOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake Te-AtaOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLower Twin LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSilver Mine LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRForest LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCranberry LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSummit LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRound LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMombasha LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRIsland PondOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLittle Dam LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake StahaheOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake AskotiOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake SkannatatiOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRUpper Lake CohassetOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake TioratiOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake KanawaukeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLittle Long PondOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake SkemontoOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWe-Wah LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTuxedo LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSterling Forest LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSterling LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWickham LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWalton LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGlenmere LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRidgebury LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRShawangunk LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHighland LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMount Hope ReservoirOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSilver LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMonhagen LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTomahawk LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGoshen ReservoirOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NROrange-Rockland LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCromwell LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPopolopen LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake MassawippaOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBull PondOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWeyants PondOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRStilwell LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMine LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLong PondOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCranberry PondOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBog Meadow PondOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake WashingtonOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBrowns PondOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBeaverdam LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBrowns PondOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMaybrook RerservoirOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRChadwick LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGuymard LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRReservoir Number TwoOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBig PondOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRReservoir Number ThreeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMartin LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHawthorne LakeOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBinnewater PondOrangeNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded

NR = not rated: there is not enough recent sampling to support a letter. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.

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Other Counties in New York

Seneca County

4 lakes · Avg grade A

Hamilton County

198 lakes · Avg grade A

Herkimer County

110 lakes · Avg grade A

Essex County

129 lakes · Avg grade A

Lewis County

33 lakes · Avg grade B

Franklin County

134 lakes · Avg grade C

See how Orange County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..

Source: EPA National Aquatic Resource Surveys, 2026.