Skip to main content
LakeQuality
Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water
A

Herkimer County Lake Quality

New York, 110 lakes, average grade A (Excellent)

Herkimer County in New York carries 110 monitored lakes — one of the lake-richer counties in our dataset. Coverage that dense usually reflects active lake-association sampling alongside state-agency monitoring. 6 of those lakes carry an A–F grade. The county-level summary describes that subset, not every water body listed. On average, Herkimer County lakes grade an A. That puts it near the top of the New York county ranking.

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. South Lake (A) is the cleanest in the county.

Loading map…

Where to stay near Herkimer County

Top-rated places to stay near Herkimer County

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

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Planning a trip to Herkimer County?

Get lake water-quality report cards plus the best cabin & lodging deals near Herkimer County — straight to your inbox. No spam, unsubscribe anytime.

Quick Answers for Herkimer County

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

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

All Lakes in Herkimer County

110 lakes · 6 graded, 104 not rated6 graded lakes · 104 not rated, hidden

#LakeGradeClarityPhosphorusAlgaeTrophicAccess
1ASouth LakeHerkimerANo recent samples4 µg/L1.1 µg/LNo recent samplesNot recorded
2AWest PondHerkimerANo recent samples10 µg/L3.3 µg/LNo recent samplesNot recorded
3ASquash PondHerkimerANo recent samples11 µg/L2 µg/LNo recent samples✓ Public
4AWillys LakeHerkimerANo recent samples4 µg/L1 µg/LNo recent samplesNot recorded
5AWindfall PondHerkimerANo recent samples9 µg/L1.6 µg/LNo recent samplesNot recorded
6ALoon Hollows PondHerkimerANo recent samples5 µg/L1 µg/LNo recent samplesNot recorded
NRFulton Chain LakesHerkimerNR10.3 ftNo recent samplesNo recent samplesNo recent samplesNot recorded
NRYoung LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWeaver LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NREast Canada LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRKyser LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRIlion Reservoir Number ThreeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSpruce LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBoyer LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRKlondike ReservoirHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLittle Salmon LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBlack Creek LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMill Creek LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSwan LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHinckley ReservoirHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRChub PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGull LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGranny MarshHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGull LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTamarack LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRNelson LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBear LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWoodhull LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGreen LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRFirst LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSecond LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRChamber LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCanachagala LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRThird LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRFourth LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSand LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLittle Woodhull LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRNorth LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSouth LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBaby LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHonnedaga LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHorn LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPico LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMoss LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBubb LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDart LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBig Moose LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSouth PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTwitchell LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSilver LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRThirsty PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHitchcock LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRIndependence LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSafford PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake RondaxeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWest LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NREast PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLittle Moose LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPanther LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTwin PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRFulton Chain LakesHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGray LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRNicks LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBlackfoot PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGibbs LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLittle Safford LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBig Otter LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NREast PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLake EaskaHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMiddle Settlement LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMiddle Branch LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHitchcock PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGrass PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRFifth Creek PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPepperbox PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSunshine PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMoshier ReservoirHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRStillwater ReservoirHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
NRMud LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWoods LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRFalls LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSalmon LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NREvergreen LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPeaked Mountain LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRShallow PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLyon LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTwin PondsHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDiana PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBear PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMiddle South PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLower South PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDismal PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHawk PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBeaverdam PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLittle Rock PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWitchhopple LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRClear LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWalker LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCrooked LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NROven LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGull LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCracker PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWolf PondHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSand LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRock LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCage LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBig FiveHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRNegro LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRock LakeHerkimerNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NREast PondHerkimerNRNo 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.

Lake Match

Which lake suits how you actually use one?

Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of graded lakes that fit, with the water quality behind each one.

Take the quiz →

Other Counties in New York

Seneca County

4 lakes · Avg grade A

Hamilton County

198 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

Clinton County

18 lakes · Avg grade C

See how Herkimer 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.