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

Sheridan County Lake Quality

Nebraska, 101 lakes, average grade B (Good)

Sheridan County in Nebraska carries 101 monitored lakes — one of the lake-richer counties in our dataset. Coverage that dense usually reflects active lake-association sampling alongside state-agency monitoring. 1 of those lake carry an A–F grade. The county-level summary describes that subset, not every water body listed. With an average grade of B, Sheridan County sits comfortably above the Nebraska median.

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. Smith Lake (B) is the cleanest in the county.

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Where to stay near Sheridan County

Top-rated places to stay near Sheridan County

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Quick Answers for Sheridan County

Cleanest lakes in Sheridan County →Cleanest lakes in Nebraska →Safest swimming lakes in Nebraska →

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

All Lakes in Sheridan County

101 lakes · 1 graded, 100 not rated1 graded lake · 100 not rated, hidden

#LakeGradeClarityPhosphorusAlgaeTrophicAccess
1BSmith LakeSheridanB1.7 ft248 µg/L56.1 µg/LNo recent samples✓ Public
NRBurton LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWilly LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMoore LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGaunt LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBerry LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRReid LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMcFall LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRStrong LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMcFall LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHiers LakesSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPotash LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPalmer LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRJesse LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSchool Section LakesSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRJess LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBower LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSchool Section LakesSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLily LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLane LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWilson LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMulhall LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCook LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHancock LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCrowther LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHarris LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWelsh LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRThompson LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDennis LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSnow LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSimondson LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCody LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRNye LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRConley LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWhite LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPotmesil LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPeter Long LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWilkinson LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWilkinson LakesSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSchool Section LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRT Briggs LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWickson LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTree Claim LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBennett LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRJoe LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTwin LakesSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLong LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDillings LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSkunk LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGoose LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRJoy LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDiamond LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTwin LakesSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCravath LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWalgren LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
NRIsham ReservoirSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRFrye LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPowell LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRThompson LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHoover LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRush LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRChokecherry LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSpring LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRound LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDolly Warden LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPetes LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSpring LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRKern LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHupp LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBillys LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRClear LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NREast Kinney LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRMinnich LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NROsborne LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRJacobs LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHebbert LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBunger LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGreen LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRStar LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRShane LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRGranning LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWatson LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWintermuth LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCarnes LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRJennings LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRO Brien LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTaylor LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRArnold LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRRoethler LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRWalters LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRKennedy LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRTin Can LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRSandow LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRPatton LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRBlack LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRShubert LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRHaines LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRDillmans LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRLouden LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRVon Krosigh LakeSheridanNRNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
NRCarmichael LakeSheridanNRNo 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 Nebraska

Sherman County

1 lake · Avg grade A

Morrill County

8 lakes · Avg grade A

Greeley County

1 lake · Avg grade A

Sioux County

8 lakes · Avg grade A

Scotts Bluff County

6 lakes · Avg grade A

Lincoln County

8 lakes · Avg grade A

See how Sheridan 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.