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

Worcester County Lake Quality

Massachusetts, 220 lakes, average grade B (Good)

Worcester County has 220 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. 21 of those lakes carry an A–F grade. The county-level summary describes that subset, not every water body listed. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.

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. Long Pond (A) is the cleanest in the county.

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Quick Answers for Worcester County

Cleanest lakes in Worcester County →Safest swimming lakes in Massachusetts →

Planning a trip? Check special fishing regulations for Long Pond — or check the official Massachusetts fishing regulations.

All Lakes in Worcester County

220 lakes · 21 graded, 199 not rated21 graded lakes · 199 not rated, hidden

Include not-rated lakes (199)

#	Lake	Grade	Clarity	Phosphorus	Algae	Trophic	Access
1	ALong PondWorcester	A	No recent samples	No recent samples	1.1 µg/L	No recent samples	✓ Public
2	AGaston PondWorcester	A	No recent samples	No recent samples	3.5 µg/L	No recent samples	Not recorded
3	ABare Hill PondWorcester	A	No recent samples	No recent samples	2.1 µg/L	No recent samples	Not recorded
4	AQueen LakeWorcester	A	No recent samples	No recent samples	3.5 µg/L	No recent samples	Not recorded
5	AWrights ReservoirWorcester	A	No recent samples	No recent samples	2.4 µg/L	No recent samples	Not recorded
6	AQuacumquasit PondWorcester	A	No recent samples	No recent samples	3.6 µg/L	No recent samples	✓ Public
7	ALily PondWorcester	A	No recent samples	No recent samples	1.7 µg/L	No recent samples	Not recorded
8	AFall Brook ReservoirWorcester	A	No recent samples	No recent samples	1.2 µg/L	No recent samples	Not recorded
9	AWachusett LakeWorcester	A	No recent samples	No recent samples	2.4 µg/L	No recent samples	Not recorded
10	ACrystal LakeWorcester	A	No recent samples	No recent samples	3.1 µg/L	No recent samples	✓ Public
11	AFort PondWorcester	A	No recent samples	No recent samples	4.1 µg/L	No recent samples	✓ Public
12	ALower Crow Hill PondWorcester	A	No recent samples	No recent samples	2.9 µg/L	No recent samples	Not recorded
13	ASudbury ReservoirWorcester	A	No recent samples	No recent samples	1.4 µg/L	No recent samples	✓ Public
14	CLittle River LakeWorcester	C	No recent samples	No recent samples	6.1 µg/L	No recent samples	✓ Public
15	CEast Brimfield ReservoirWorcester	C	No recent samples	No recent samples	5.9 µg/L	No recent samples	✓ Public
16	CSargent PondWorcester	C	No recent samples	No recent samples	5.2 µg/L	No recent samples	Not recorded
17	DMuddy Brook LakeWorcester	D	No recent samples	No recent samples	13.8 µg/L	No recent samples	✓ Public
18	DRobbins PondWorcester	D	No recent samples	No recent samples	17.4 µg/L	No recent samples	Not recorded
19	DStodge Meadow PondWorcester	D	No recent samples	No recent samples	9.2 µg/L	No recent samples	Not recorded
20	DLittle Chauncy PondWorcester	D	No recent samples	No recent samples	30 µg/L	No recent samples	✓ Public
21	FBartlett PondWorcester	F	No recent samples	No recent samples	37.5 µg/L	No recent samples	✓ Public
	NRPatch ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake ChaubunagungamaugWorcester	NR	6.6 ft	No recent samples	No recent samples	No recent samples	Not recorded
	NRWachusett ReservoirWorcester	NR	25.8 ft	No recent samples	No recent samples	No recent samples	Not recorded
	NRWebster LakeWorcester	NR	No recent samples	No recent samples	3.9 µg/L	No recent samples	✓ Public
	NRLake QuinsigamondWorcester	NR	No recent samples	No recent samples	2.5 µg/L	No recent samples	✓ Public
	NRIndian LakeWorcester	NR	No recent samples	No recent samples	12.8 µg/L	No recent samples	✓ Public
	NREast Brimfield LakeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRComins PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWickaboag PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRBrookhaven LakeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPottapaug PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRQuabbin ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLong PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSportsmans PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake EllisWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRBates Powers ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRReservoir Number TwoWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRRiceville PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHarvard PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSouth Athol PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWhite PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRDavenport PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake RohuntaWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRConnor PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCarter PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NROld ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWilliamsville PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRBrigham PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRAsnacomet PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRBickford PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRMoosehorn PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCunningham PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWaite PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLovewell PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRMare Meadow ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRNoyes PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWyman PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRMeetinghouse PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRRound Meadow PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRGreenwood PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPartridge PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRUpper ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPartridgeville PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRBents PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRBourn-Hadley PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRParker PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPerley Brook ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRStoddard PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake DenisonWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRBeaver PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWhites Mill PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRUpper Naukeag LakeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLower Naukeag LakeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSunset LakeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake WataticWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWallace PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWard PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLincoln PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWinnekeag LakeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake WampanoagWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCrystal LakeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWhitmanville ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCrocker PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake WhalomWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRLovell ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRScott ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHickory Hills LakeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRMirror LakeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSpectacle PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWhite PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake ShirleyWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRMassapoag PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPierce PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSnows MillpondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSawmill PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRNotown ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRParadise PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHaynes ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHeywood ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake SamosetWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHy-Crest PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRMilford PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHopedale PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSudbury ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRMossy PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSouth Meadow PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCoachlace PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRGates PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRChauncy LakeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRRocky PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRNewton PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRGreen Hill PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRIndian LakeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRChaffin PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NREast Waushacum PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRThe QuagWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWest Waushacum PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRQuinapoxet ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRMaple Spring PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NREagle LakeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRStump PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRMuschopauge PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRDemond PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRThayer PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRMoulton PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRAdams PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWhitehall PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRDean PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCusky PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHorse PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRDoane PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRBrooks PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRBrowning PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRThompson PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRTurkey Hill PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NREames PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRAsnebumskit PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPine Hill ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRKendall ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHolden Reservoir Number TwoWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHolden Reservoir Number OneWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRKettle Brook Reservoir Number FourWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRKettle Brook Reservoir Number ThreeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRKettle Brook Reservoir Number TwoWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWaite PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLynde Brook ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRStoneville ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRGreenville PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHenshaw PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRBurncoat PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCedar Meadow PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRStiles ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake WhittemoreWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSugden ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake LashawayWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRCranberry Meadow PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRQuaboag PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRRice ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRAlum PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRWalker PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPikes PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRGlen Echo LakeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRJones PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRTexas PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRRochdale PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRRamshorn PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRClark ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSingletary PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRPondville PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRStoneville PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLeesville PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCurtis PondsWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCoes ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRFlint PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRFlint PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRDorothy PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLake RippleWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHocomonco PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWestboro ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPratt PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWest River ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRFisherville PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCarpenter ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLinwood PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCarpenter ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSwans PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWhitins PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRMeadow PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLackey PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRIronstone ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRClub PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWhitin ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRStevens PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRManchaug PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRTuckers PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSacarrappa PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRRobinson PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLowes PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPeter PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLarner PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRNew PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHayden PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPierpoint Meadow PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRBaker PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSylvestri PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSouth Charlton ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPrindle LakeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCedar PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLeadmine PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRWestville LakeWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRMorse PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCohasse Brook ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRNumber Four ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRNumber Five ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHamant Brook ReservoirWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRMerino PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHarris PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHarris PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRNipmack PondWorcester	NR	No recent samples	No recent samples	No recent samples	No recent samples	Not 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 Massachusetts

Franklin County

26 lakes · Avg grade A

Norfolk County

32 lakes · Avg grade A

Berkshire County

72 lakes · Avg grade B

Barnstable County

94 lakes · Avg grade B

Hampshire County

21 lakes · Avg grade B

Plymouth County

104 lakes · Avg grade C

See how Worcester 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.