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Tap water quality report

Somersworth Water Works

EPA monitoring tested this supplier for 108 contaminants and detected 18. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

108
contaminants tested
18
detected
12,200
people served
153
health-based violations
New Hampshire rankingsLead in New HampshirePFAS in New Hampshire
Water source
Surface water
Ownership
Local government
Counties served
Strafford

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.

153
health-based violations
157
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2007-04-01 → 2007-06-30
MCL Health-based Resolved 2007-04-01 → 2007-06-30
MCL Health-based Resolved 2007-04-01 → 2007-06-30
MCL Health-based Resolved 2007-04-01 → 2007-06-30
MCL Health-based Resolved 2007-04-01 → 2007-06-30
MCL Health-based Resolved 2007-04-01 → 2007-06-30
MCL Health-based Resolved 2007-04-01 → 2007-06-30
MCL Health-based Resolved 2007-04-01 → 2007-06-30
MCL Health-based Resolved 2007-01-01 → 2007-03-31
MCL Health-based Resolved 2007-01-01 → 2007-03-31

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Bromodichloromethane
9.72 µg/L
No EPA limit set
worst single sample: 12 µg/L
88/90 SYR4 2014–2019
Chloroform
49.65 µg/L
No EPA limit set
worst single sample: 57 µg/L
88/90 SYR4 2014–2019
TTHM
60 µg/L 75%
of the EPA limit 80 µg/L
worst single sample: 68 µg/L
87/88 SYR4 2014–2019
Dichloroacetic Acid
17 µg/L
No EPA limit set
worst single sample: 19 µg/L
82/82 SYR4 2014–2019
Total Haloacetic Acids (HAA5)
34 µg/L 57%
of the EPA limit 60 µg/L
worst single sample: 40 µg/L
82/82 SYR4 2014–2019
Trichloroacetic Acid
21 µg/L
No EPA limit set
worst single sample: 23 µg/L
82/82 SYR4 2014–2019
Copper
221.224 µg/L 17%
of the EPA limit 1300 µg/L
worst single sample: 242.05 µg/L
69/69 SYR4 2014–2019
Dibromochloromethane
2.23 µg/L
No EPA limit set
worst single sample: 2.5 µg/L
55/90 SYR4 2014–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 16/16 LCR 2023
Nitrate
340 µg/L 3.4%
of the EPA limit 10000 µg/L
 12/22 SYR4 2014–2019
Lead
13.1572 µg/L 88%
of the EPA limit 15 µg/L
worst single sample: 14.3535 µg/L
7/63 SYR4 2014–2017
Barium
8.13973 µg/L 0.4%
of the EPA limit 2000 µg/L
worst single sample: 9.1 µg/L
5/6 SYR4 2014–2019
Combined Radium (-226 And -228)
0.9750 pCi/L 20%
of the EPA limit 5 pCi/L
worst single sample: 1 pCi/L
2/2 SYR4 2015
Nitrate-Nitrite
282.5 µg/L 2.8%
of the EPA limit 10000 µg/L
worst single sample: 290 µg/L
2/2 SYR4 2014
Arsenic
1.3 µg/L 13%
of the EPA limit 10 µg/L
 1/6 SYR4 2014–2019
Chromium
1.784 µg/L 1.8%
of the EPA limit 100 µg/L
 1/6 SYR4 2014–2019
Gross Alpha, Excl. Radon And U
0.2000 pCi/L 1.3%
of the EPA limit 15 pCi/L
 1/2 SYR4 2015
Monochloroacetic Acid
3.4 µg/L
No EPA limit set
 1/82 SYR4 2014–2019
90 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebDiquatEthylene DibromideEndrinEthylbenzeneFluorideGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MICHAEL BOBINSKY

Frequently asked questions about Somersworth Water Works

Is Somersworth Water Works tap water safe to drink?

EPA monitoring detected 18 contaminants in Somersworth Water Works'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 Somersworth Water Works's water?

EPA monitoring detected Bromodichloromethane, Chloroform, TTHM, Dichloroacetic Acid, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Somersworth Water Works serve?

Somersworth Water Works reports serving 12,200 people in New Hampshire, per its EPA record.

Has Somersworth Water Works had any water quality violations?

The EPA has 157 violations on file for Somersworth Water Works, of which 153 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.