Massachusetts tap water quality
529 active community water systems.
Largest water systems
| Grade | System | People | Health violations (5y) |
|---|
| A | Massachusetts Water Resources Authority (MWRA) | 2,580,000 | 0 |
| A | Tri-Town Water Board (Braintree–Holbrook–Randolph) | 856,000 | 0 |
| A | Boston Water and Sewer Commission | 675,647 | 0 |
| A | Worcester Dpwp, Water Supply Division | 206,518 | 0 |
| D | Springfield Water and Sewer Commission | 169,170 | 23 |
| A | Lowell Regional Water Utility | 120,418 | 0 |
| A | Cambridge Water Department | 118,214 | 0 |
| A | Quincy Water Dept. (MWRA) | 106,000 | 0 |
| A | Brockton Water Department | 105,788 | 0 |
| B | Inima USA / Aquaria LLC | 105,643 | 0 |
| A | Lynn Water and Sewer Comm | 101,253 | 0 |
| A | City of New Bedford Dpi | 101,079 | 0 |
| A | Falmouth Water Dept | 97,551 | 0 |
| A | Fall River Water Department | 94,000 | 0 |
| C | Salem and Beverly Water Supply Board | 90,330 | 1 |
| A | Lawrence Water Works | 89,143 | 0 |
| A | Newton Water Dept. (MWRA) | 88,931 | 0 |
| A | Somerville Water Dept. (MWRA) | 81,045 | 0 |
| A | Framingham Water Dept. (MWRA) | 72,362 | 0 |
| A | Malden Water Division (MWRA) | 66,263 | 0 |
| A | Waltham Water Department | 65,218 | 0 |
| A | Dennis Water District | 65,000 | 0 |
| A | Brookline Water and Sewer Division | 63,191 | 0 |
| A | Revere Water Division (MWRA) | 62,186 | 0 |
| A | Taunton Water Division | 62,165 | 0 |
| C | Medford Water Dept. (MWRA) | 61,700 | 2 |
| A | Haverhill Water Dept | 61,277 | 0 |
| A | Weymouth Water Department | 57,871 | 0 |
| A | Upper Cape Regional Water Cooperative | 56,250 | 0 |
| A | Chicopee Water Dept (MWRA) | 55,560 | 0 |
| B | Peabody Water Dept. | 54,481 | 0 |
| A | Methuen Water Dept | 53,059 | 0 |
| C | Centerville Osterville Marstons Mills WD | 50,000 | 0 |
| A | Everett Water Dept. (MWRA) | 49,075 | 0 |
| A | Beverly Water Dept | 47,461 | 0 |
| A | Plymouth Water Department | 47,100 | 0 |
| A | Randolph/Holbrook Joint Water Board | 46,519 | 0 |
| B | Attleboro Water Dept | 46,461 | 0 |
| A | Arlington Water Dept. (MWRA) | 46,308 | 0 |
| A | Weir River Water System | 45,339 | 0 |
| A | Salem Water Department | 44,480 | 0 |
| A | Pittsfield Dpu Water Dept | 43,927 | 0 |
| C | Billerica Water Works | 42,119 | 3 |
| A | Fitchburg Dpw Division of Water Supply | 41,946 | 0 |
| A | Marlborough Dpw Water Div. (MWRA) | 41,799 | 0 |
| A | Leominster Water Division | 41,683 | 0 |
| D | Dedham Westwood Water Dist. | 41,630 | 1 |
| A | Westfield Dpwwater Division | 41,094 | 0 |
| C | Woburn Water Dept. | 40,876 | 0 |
| A | Chelsea Water Dept. (MWRA) | 40,787 | 0 |
Most issues (systems serving 10,000+)
F5 health-based violations in the last 5 years; 15 monitoring/reporting violations; 2 not yet resolved; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Lead 90th percentile below the action level (2025).
D9 health-based violations in the last 5 years; 1 monitoring/reporting violation; 1 not yet resolved; PFOA/PFOS average above the 4 ppt federal limit: PFOA; Lead 90th percentile below the action level (2026).
D3 health-based violations in the last 5 years; 3 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOS; Lead 90th percentile below the action level (2025).
DNo health-based violations in the last 5 years; 30 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Other PFAS above 2024 limits (rule proposed for repeal): PFHxS, Hazard Index; Lead 90th percentile below the action level (2025).
D7 health-based violations in the last 5 years; 2 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
D4 health-based violations in the last 5 years; 1 monitoring/reporting violation; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
D23 health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
D5 health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
D1 health-based violation in the last 5 years; 2 monitoring/reporting violations; 1 not yet resolved; PFOA/PFOS average above the 4 ppt federal limit: PFOS, PFOA; Lead 90th percentile below the action level (2025).
DNo health-based violations in the last 5 years; 1 monitoring/reporting violation; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Other PFAS above 2024 limits (rule proposed for repeal): PFHxS, Hazard Index; Lead 90th percentile below the action level (2023).
D2 health-based violations in the last 5 years; 3 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOA; Lead 90th percentile below the action level (2026).
D1 health-based violation in the last 5 years; PFOA/PFOS average above the 4 ppt federal limit: PFOS, PFOA; Lead 90th percentile below the action level (2025).
D1 health-based violation in the last 5 years; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Lead 90th percentile below the action level (2025).
DNo health-based violations in the last 5 years; 22 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOS, PFOA; Lead 90th percentile below the action level (2026).
DNo health-based violations in the last 5 years; 64 monitoring/reporting violations; 2 not yet resolved; PFOA/PFOS average above the 4 ppt federal limit: PFOS, PFOA; Lead 90th percentile below the action level (2025).
DNo health-based violations in the last 5 years; 25 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Lead 90th percentile below the action level (2025).
DNo health-based violations in the last 5 years; 48 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Lead 90th percentile below the action level (2025).
CNo health-based violations in the last 5 years; 7 monitoring/reporting violations; 3 not yet resolved; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Lead 90th percentile below the action level (2026).
C3 health-based violations in the last 5 years; 1 monitoring/reporting violation; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
C3 health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
Cities
AbingtonActonAcushnetAdamsAgawamAllstonAmesburyAmherstAndoverArlingtonAshburnhamAshfieldAshlandAssonetAtholAttleboroAttleboro FallsAuburnAuburndaleAvonAyerBabson ParkBaldwinvilleBarnstableBarreBedfordBelchertownBellinghamBelmontBerkleyBerkshireBerlinBernardstonBeverlyBillericaBlackstoneBlandfordBoltonBondsvilleBostonBourneBoxboroughBoxfordBoylstonBraintreeBrant RockBrewsterBridgewaterBrightonBrimfieldBrocktonBrookfieldBrooklineBrookline VillageBurlingtonBuzzards BayByfieldCambridgeCantonCarlisleCarverCataumetCentervilleCharlemontCharlestownCharltonChathamChelmsfordChelseaCherry ValleyCheshireChesterChestnut HillChicopeeChilmarkClarksburgClintonCohassetColrainConcordCotuitCummaquidCummingtonCuttyhunkDaltonDanversDartmouthDedhamDeerfieldDennisDennis PortDevensDightonDorchesterDorchester CenterDouglasDoverDracutDudleyDunstableDuxburyEast BridgewaterEast BrookfieldEast DennisEast FalmouthEast FreetownEast LongmeadowEast OrleansEast SandwichEast TauntonEast TempletonEast WalpoleEast WarehamEast WeymouthEasthamEasthamptonEastonEdgartownEgremontErvingEssexEverettFairhavenFall RiverFalmouthFayvilleFeeding HillsFiskdaleFitchburgFlorenceForestdaleFoxboroFoxboroughFraminghamFranklinFreetownGardnerGeorgetownGilbertvilleGillGlendaleGloucesterGoshenGosnoldGraftonGranbyGranvilleGreat BarringtonGreen HarborGreenfieldGrotonGrovelandHadleyHalifaxHamiltonHampdenHancockHanoverHanscom AfbHansonHardwickHarvardHarwichHarwich PortHatfieldHathorneHaverhillHaydenvilleHinghamHinsdaleHolbrookHoldenHollistonHolyokeHopedaleHopkintonHousatonicHubbardstonHudsonHullHumarockHuntingtonHyannisHyannis PortHyde ParkIndian OrchardIpswichJamaica PlainJeffersonKingstonLake PleasantLakevilleLancasterLanesboroughLawrenceLeeLeedsLeicesterLenoxLenox DaleLeominsterLexingtonLincolnLittletonLongmeadowLowellLudlowLunenburgLynnLynnfieldMaldenManchesterMansfieldMarbleheadMarionMarlboroughMarshfieldMarshfield HillsMarstons MillsMashpeeMattapanMattapoisettMaynardMedfieldMedfordMedwayMelroseMendonMerrimacMethuenMiddleboroMiddleboroughMiddletonMilfordMill RiverMillburyMillers FallsMillisMiltonMilton VillageMonponsettMonroeMonroe BridgeMonsonMontagueMontereyMonument BeachNahantNantucketNatickNeedhamNeedham HeightsNew BedfordNew MarlboroughNew TownNewburyNewburyportNewtonNewton CenterNewton HighlandsNewton Lower FallsNewton Upper FallsNewtonvilleNonantumNorfolkNorth AdamsNorth AmherstNorth AndoverNorth AttleboroNorth AttleboroughNorth BillericaNorth BrookfieldNorth ChathamNorth ChelmsfordNorth DartmouthNorth DightonNorth EasthamNorth EastonNorth FalmouthNorth GraftonNorth MarshfieldNorth OxfordNorth ReadingNorth TruroNorth WalthamNorth WeymouthNorthamptonNorthboroughNorthbridgeNorthfieldNortonNorwellNorwoodNutting LakeOak BluffsOcean BluffOnsetOrangeOrleansOstervilleOtisOxfordPalmerPaxtonPeabodyPembrokePepperellPetershamPinehurstPittsfieldPlainfieldPlainvillePlymouthPlymptonPocassetProvincetownQuincyRandolphRaynhamRaynham CenterReadingReadvilleRehobothRevereRichmondRochdaleRochesterRocklandRockportRoslindaleRoweRowleyRoxburyRoxbury CrossingRoyalstonRussellRutlandSagamoreSagamore BeachSalemSalisburySandisfieldSandwichSaugusScituateSeekonkSharonSheffieldShelburneShelburne FallsSherbornShirleyShrewsburySiasconsetSomersetSomervilleSouth BarreSouth CarverSouth ChathamSouth DartmouthSouth DeerfieldSouth DennisSouth EastonSouth EgremontSouth GraftonSouth HadleySouth HamiltonSouth LancasterSouth OrleansSouth WalpoleSouth WellfleetSouth WeymouthSouth YarmouthSouthamptonSouthboroughSouthbridgeSouthfieldSouthwickSpencerSpringfieldSterlingStockbridgeStonehamStoughtonStowSturbridgeSudburySunderlandSuttonSwampscottSwanseaTauntonTempletonTewksburyThorndikeThree RiversTisburyTopsfieldTownsendTruroTurners FallsTyngsboroTyngsboroughUptonUxbridgeVineyard HavenWabanWakefieldWalesWalpoleWalthamWareWarehamWarrenWatertownWaylandWebsterWellesleyWellesley HillsWellfleetWenhamWest BarnstableWest BoylstonWest BridgewaterWest BrookfieldWest ChathamWest DennisWest FalmouthWest HarwichWest HatfieldWest MillburyWest NewburyWest NewtonWest RoxburyWest SpringfieldWest StockbridgeWest TisburyWest TownsendWest WarehamWest WarrenWest YarmouthWestboroughWestfieldWestfordWestminsterWestonWestportWestwoodWeymouthWhatelyWheelwrightWhitinsvilleWhitmanWilbrahamWilliamsburgWilliamstownWilmingtonWinchendonWinchesterWinthropWoburnWoods HoleWorcesterWorthingtonWrenthamYarmouthYarmouth Port