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WaterSafeCheck
Official EPA SDWIS Statewide AnalysisState Water Quality & Testing Directory

New Hampshire Drinking Water Quality & Testing Directory

Comprehensive EPA compliance records, water testing guidelines, and city rankings covering all 282 ZIP codes across New Hampshire

Quick Summary: Is Tap Water Safe in New Hampshire?

Drinking water in New Hampshire receives an average composite safety score of 64.3/100 based on EPA Safe Drinking Water Act records. Approximately 0% of monitored ZIP codes earn an "A" grade. Water sources are 34.4% surface water and 65.6% groundwater, resulting in Hard to Very Hard mineral hardness across the state.

Total ZIP Codes

282

Health Violations (5yr)

301

Statewide Avg Score

64.3/100

High Lead Risk Areas

71.6%

Overview: Drinking Water in New Hampshire

Drinking water quality in New Hampshire averages a composite safety score of 64.3/100 across its 282 monitored ZIP codes. Approximately 0% of ZIP codes in the state receive an "A" grade, while 2% receive an "F" grade. Environmental standards are enforced by New Hampshire Department of Environmental Services.

Surface Water

34.4%

of ZIP codes

Total Violations

809

5-year record

Grade A ZIPs

0

0% of state

Grade F ZIPs

6

2% of state

Water Quality Grade Distribution in New Hampshire

How do New Hampshire's 282 ZIP codes stack up by water quality grade?

A
0 ZIP codes0%
B
133 ZIP codes47%
C
69 ZIP codes24%
D
74 ZIP codes26%
F
6 ZIP codes2%

Popular Cities in New Hampshire

Click any city to view ZIP code-level water quality reports

Manchester

9 ZIPs

B

Nashua

5 ZIPs

B

Concord

4 ZIPs

D

Portsmouth

4 ZIPs

B

Rochester

4 ZIPs

B

Tilton

3 ZIPs

B

Dover

3 ZIPs

B

Laconia

2 ZIPs

B

Keene

2 ZIPs

B

Lebanon

2 ZIPs

B

Hampton

2 ZIPs

B

Amherst

1 ZIP

C

Auburn

1 ZIP

B

Brookline

1 ZIP

C

Candia

1 ZIP

B

Chester

1 ZIP

B

Deerfield

1 ZIP

B

Derry

1 ZIP

B

East Candia

1 ZIP

C

East Derry

1 ZIP

D

Epping

1 ZIP

D

Francestown

1 ZIP

B

Fremont

1 ZIP

B

Goffstown

1 ZIP

C

Dunbarton

1 ZIP

C

Greenfield

1 ZIP

D

Greenville

1 ZIP

C

Hollis

1 ZIP

B

Hudson

1 ZIP

B

Litchfield

1 ZIP

B

Londonderry

1 ZIP

B

Merrimack

1 ZIP

B

Milford

1 ZIP

B

Mont Vernon

1 ZIP

D

New Boston

1 ZIP

C

New Ipswich

1 ZIP

B

North Salem

1 ZIP

C

Pelham

1 ZIP

C

Raymond

1 ZIP

B

Salem

1 ZIP

C

City A-Z Directory — New Hampshire

Browse water quality reports for every town and city in New Hampshire.

A
AcworthAlsteadAltonAlton BayAmherstAndoverAntrimAshlandAshuelotAtkinsonAuburn
B
BarnsteadBarringtonBartlettBathBedfordBelmontBenningtonBerlinBethlehemBowBradfordBretton WoodsBristolBrookline
C
CamptonCanaanCandiaCanterburyCenter BarnsteadCenter ConwayCenter HarborCenter OssipeeCenter SandwichCenter StraffordCenter TuftonboroCharlestownChesterChesterfieldChichesterChocoruaClaremontColebrookConcordContoocookConwayCornishCornish Flat
D
DanburyDanvilleDeerfieldDerryDoverDrewsvilleDublinDunbartonDurham
E
East AndoverEast CandiaEast DerryEast HampsteadEast KingstonEast WakefieldEaton CenterEffinghamElkinsEnfieldEnfield CenterEppingEpsomErrolEtnaExeter
F
FarmingtonFitzwilliamFrancestownFranconiaFranklinFreedomFremont
G
Georges MillsGilfordGilmantonGilmanton Iron WorksGilsumGlenGlencliffGoffstownGorhamGoshenGraftonGranthamGreenfieldGreenlandGreenvilleGrovetonGuild
H
HampsteadHamptonHampton FallsHancockHanoverHarrisvilleHaverhillHebronHennikerHillHillsboroughHinsdaleHoldernessHollisHooksettHudson
I
Intervale
J
JacksonJaffreyJefferson
K
KearsargeKeeneKingston
L
LaconiaLancasterLebanonLeeLempsterLincolnLisbonLitchfieldLittletonLochmereLondonderryLoudonLymeLyme CenterLyndeborough
M
MadburyMadisonManchesterMarlboroughMarlowMelvin VillageMeredithMeridenMerrimackMilanMilfordMiltonMilton MillsMirror LakeMonroeMont VernonMoultonboroughMount Washington
N
NashuaNelsonNew BostonNew CastleNew DurhamNew HamptonNew IpswichNew LondonNewburyNewfieldsNewmarketNewportNewtonNewton JunctionNorth ConwayNorth HamptonNorth HaverhillNorth SalemNorth SandwichNorth StratfordNorth SuttonNorth WalpoleNorth WoodstockNorthwoodNottingham
O
OrfordOssipee
P
PelhamPeterboroughPiermontPikePittsburgPittsfieldPlainfieldPlaistowPlymouthPortsmouth
R
RandolphRaymondRindgeRochesterRollinsfordRumneyRyeRye Beach
S
SalemSalisburySanborntonSanbornvilleSandownSeabrookSilver LakeSomersworthSouth AcworthSouth NewburySouth SuttonSouth TamworthSpoffordSpringfieldStoddardStraffordStrathamSugar HillSullivanSunapeeSuncookSwanzey
T
TamworthTempleThorntonTiltonTroyTwin Mountain
U
Union
W
WalpoleWarnerWarrenWashingtonWaterville ValleyWeareWentworthWest ChesterfieldWest LebanonWest NottinghamWest OssipeeWest PeterboroughWest StewartstownWest SwanzeyWestmorelandWhitefieldWilmotWiltonWinchesterWindhamWinnisquamWolfeboroWolfeboro FallsWonalancetWoodstockWoodsville

🏆 Highest Rated ZIP Codes in New Hampshire

03052Litchfield
83/100
B
03061Nashua
83/100
B
03063Nashua
83/100
B
03064Nashua
83/100
B
03235Franklin
83/100
B

⚠ Lowest Rated ZIP Codes in New Hampshire

03849Madison
12/100
F
03838Glen
15/100
F
03816Center Tuftonboro
31/100
F
03256New Hampton
33/100
F
03814Center Ossipee
34/100
F

Common Drinking Water Contaminants in New Hampshire

The following are common regulated contaminants found in New Hampshire drinking water based on EPA violation records. Click any contaminant to learn about EPA safety limits and health effects.

Consumer Confidence Report RuleContaminant 0700BariumTotal Trihalomethanes (TTHM)Stage 1 DBP RuleE. coliHaloacetic Acids (HAA5)Gross Beta

Source: EPA Safe Drinking Water Act Maximum Contaminant Level regulations. For the complete list of regulated contaminants and MCLs, see the Water Quality Safety Guide.

Frequently Asked Questions — New Hampshire Drinking Water

Is tap water generally safe to drink in New Hampshire?+
Yes, for the majority of residents, tap water in New Hampshire is treated and regulated. However, compliance varies by city. State-wide, 0 ZIP codes receive an "A" grade, while 6 receive an "F". Search your specific ZIP code to see your local utility's record.
How do I test water quality or well water in New Hampshire?+
Residents in New Hampshire can test their tap or well water by contacting laboratories certified by New Hampshire Department of Environmental Services or ordering an EPA-standard laboratory water testing kit. Annual testing is recommended for private wells to test for bacteria, nitrates, and heavy metals.
What are the biggest water quality issues in New Hampshire?+
The primary issues include managing 301 health-based violations state-wide and resolving infrastructure age. 71.6% of ZIP codes in the state have a high probability of lead exposure risk due to pre-1986 piping.
Who regulates and enforces drinking water standards in New Hampshire?+
Drinking water in New Hampshire is regulated by New Hampshire Department of Environmental Services under a primacy agreement with the U.S. EPA.
Where does New Hampshire get its drinking water?+
Approximately 34.4% of monitored areas in New Hampshire rely on surface water sources (lakes/rivers), while the rest use groundwater aquifers.
How do I find the official water quality report for my home in New Hampshire?+
Search your ZIP code on our site to view data compiled from EPA records, or contact your local utility for their annual Consumer Confidence Report (CCR).
View All 282 ZIP Codes in New Hampshire

Browse EPA water quality data for every monitored ZIP code. For faster results, use the search bar above.

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All 282 ZIP codes in New Hampshire are actively monitored under the EPA Safe Drinking Water Act.