New Hampshire tap water quality
706 active community water systems.
Largest water systems
| Grade | System | People | Health violations (5y) |
|---|
| B | Manchester Water Works | 123,500 | 0 |
| A | Pennichuck Water Works | 88,853 | 0 |
| A | Concord Water Dept | 44,215 | 0 |
| A | Aquarion Water/Nh | 34,000 | 0 |
| C | Portsmouth Water Works | 33,000 | 0 |
| A | Keene Water Dept | 30,000 | 0 |
| A | Dover Water Dept | 29,000 | 0 |
| A | Merrimack Village Dist | 25,500 | 0 |
| B | Rochester Water Dept | 25,000 | 1 |
| B | Salem Water Dept | 21,080 | 0 |
| A | Derry Water Dept | 17,528 | 0 |
| A | Laconia Water Works | 17,125 | 0 |
| B | Hudson Water Dept | 16,700 | 0 |
| A | Unh/Durham Water Sys | 16,000 | 0 |
| A | Seabrook Water Dept | 14,000 | 0 |
| B | Lebanon Water Dept | 13,600 | 1 |
| B | Exeter Water Dept | 12,236 | 1 |
| A | Somersworth Water Works | 12,200 | 0 |
| A | Pease Trade Port | 9,900 | 0 |
| A | Hanover Water Dept | 9,600 | 0 |
| A | Berlin Water Works | 9,575 | 0 |
| A | Milford Water Utilities Dept | 9,500 | 0 |
| B | Claremont Water Dept | 9,000 | 1 |
| A | Franklin Water Works | 7,200 | 0 |
| B | Hampstead Area Water | 7,153 | 0 |
| B | Litchfield | 6,920 | 0 |
| A | Plymouth Vlg Water and Sewer | 6,700 | 0 |
| A | Littleton Water and Light | 6,500 | 0 |
| B | Londonderry | 6,255 | 0 |
| A | Wolfeboro Water and Sewer | 6,000 | 0 |
| B | North Conway Water Pct | 5,500 | 0 |
| A | Pembroke Water Works | 5,200 | 0 |
| A | Newmarket Water Works | 5,030 | 0 |
| A | Newport Water Works | 5,000 | 0 |
| A | Central Hooksett Water Pct | 4,650 | 0 |
| A | Peterborough Water Works | 4,500 | 0 |
| D | Rye Water Dist | 4,300 | 1 |
| A | Lower Bartlett Water Pct | 3,850 | 0 |
| A | Penacook Boscawen Water Pct | 3,800 | 0 |
| B | Jaffrey Water Works | 3,800 | 0 |
| C | Meredith Water Dept | 3,750 | 3 |
| A | Bristol Water Works | 3,575 | 0 |
| A | Village Dist of Eastman | 3,400 | 0 |
| A | Lincoln Water Works | 3,300 | 0 |
| A | Raymond Water Dept | 3,300 | 0 |
| D | Goffstown Village Pct | 3,250 | 3 |
| A | Farmington Water Dept | 3,250 | 0 |
| A | New London Springfield Water | 3,250 | 0 |
| A | Waterville Valley Water Dist | 3,150 | 0 |
| A | Hooksett Village Water Pct | 3,000 | 0 |
Most issues (systems serving 10,000+)
CNo health-based violations in the last 5 years; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Lead 90th percentile below the action level (2024).
BNo health-based violations in the last 5 years; 2 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOA; Lead 90th percentile below the action level (2024).
BNo health-based violations in the last 5 years; 2 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOA; Lead 90th percentile below the action level (2024).
BNo health-based violations in the last 5 years; PFOA/PFOS average above the 4 ppt federal limit: PFOA; Lead 90th percentile below the action level (2024).
B1 health-based violation in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).
B1 health-based violation in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
B1 health-based violation in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
ANo 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 (2024).
ANo 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 (2024).
ANo 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 (2024).
ANo health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).
ANo health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).
ANo health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
ANo health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
ANo health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).
ANo health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).
ANo health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
ANo health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).
Cities
AlbanyAlexandriaAllenstownAlsteadAltonAmherstAndoverAntrimAshlandAshuelotAtkinsonAuburnBarnsteadBarringtonBartlettBathBedfordBelmontBenningtonBentonBerlinBethlehemBoscawenBowBradfordBrentwoodBridgewaterBristolCamptonCanaanCandiaCanterburyCarrollCenter BarnsteadCenter HarborCenter OssipeeCenter TuftonboroCharlestownChesterChichesterChocoruaClaremontColebrookColumbiaConcordContoocookConwayCornishDanvilleDeerfieldDeeringDerryDoverDunbartonDurhamEast HampsteadEast KingstonEast WakefieldEaton CenterEffinghamElkinsEnfieldEppingEpsomErrolEtnaExeterFarmingtonFitzwilliamFrancestownFranconiaFranklinFreedomFremontGeorges MillsGilfordGilsumGlenGlencliffGoffstownGorhamGranthamGreenfieldGreenlandGreenvilleGrovetonHales LocationHampsteadHamptonHampton FallsHancockHanoverHaverhillHebronHennikerHillHillsboroughHinsdaleHoldernessHollisHooksettHopkintonHudsonIntervaleJacksonJaffreyKearsargeKeeneKingstonLaconiaLancasterLebanonLeeLincolnLisbonLitchfieldLittletonLondonderryLoudonLymeMadburyMadisonManchesterMarlboroughMelvin VillageMeredithMeridenMerrimackMiddletonMilanMilfordMiltonMirror LakeMonroeMont VernonMoultonboroughNashuaNew CastleNew DurhamNew HamptonNew IpswichNew LondonNewburyNewfieldsNewmarketNewportNewtonNorth ConwayNorth HamptonNorth HaverhillNorth StratfordNorth WalpoleNorth WoodstockNorthfieldNorthumberlandNorthwoodNottinghamOrfordOssipeePelhamPembrokePeterboroughPittsburgPittsfieldPlainfieldPlaistowPlymouthPortsmouthRandolphRaymondRindgeRochesterRollinsfordRumneyRyeSalemSanborntonSanbornvilleSandownSeabrookSilver LakeSomersworthSpoffordSpringfieldStewartstownStraffordStratfordStrathamSugar HillSunapeeSuncookSurrySwanzeyTamworthTempleThorntonTiltonTroyTuftonboroTwin MountainUnionUnityWakefieldWalpoleWarnerWarrenWaterville ValleyWeareWebsterWest LebanonWest NottinghamWest OssipeeWest PeterboroughWestmorelandWhitefieldWilmotWiltonWinchesterWindhamWindsorWolfeboroWolfeboro FallsWoodstock