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Tap water quality report

Hemlock Haven

EPA monitoring tested this supplier for 68 contaminants and detected 3. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

68
contaminants tested
3
detected
207
people served
24
health-based violations
New Hampshire rankingsLead in New HampshirePFAS in New Hampshire
Water source
Ground water
Ownership
Private
Counties served
Rockingham

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

24
health-based violations
47
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2023-10-01 → 2023-11-01
MCL Health-based Resolved 2023-10-01 → 2023-11-01
MCL Health-based Resolved 2023-10-01 → 2023-11-01
MCL Health-based Resolved 2023-10-01 → 2023-11-01
MCL Health-based Archived 1991-08-01 → 1991-08-31
MCL Health-based Archived 1991-08-01 → 1991-08-31
MCL Health-based Archived 1991-08-01 → 1991-08-31
MCL Health-based Archived 1991-08-01 → 1991-08-31
MCL Health-based Resolved 1991-07-01 → 1991-07-31
MCL Health-based Resolved 1991-07-01 → 1991-07-31

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
410 µg/L 4.1%
of the EPA limit 10000 µg/L
 12/12 SYR4 2014–2019
Nitrate-Nitrite
410 µg/L 4.1%
of the EPA limit 10000 µg/L
 6/6 SYR4 2014–2019
Fluoride
280 µg/L 7%
of the EPA limit 4000 µg/L
 1/2 SYR4 2015–2018
65 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCopperCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumCombined Radium (-226 And -228)Combined UraniumDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEthylene DibromideEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Frequently asked questions about Hemlock Haven

Is Hemlock Haven tap water safe to drink?

EPA monitoring detected 3 contaminants in Hemlock Haven's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Hemlock Haven's water?

EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride. The full list with the level and data source for each is above.

How many people does Hemlock Haven serve?

Hemlock Haven reports serving 207 people in New Hampshire, per its EPA record.

Has Hemlock Haven had any water quality violations?

The EPA has 47 violations on file for Hemlock Haven, of which 24 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.