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Manchester Water Works

EPA monitoring tested this supplier for 109 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

109
contaminants tested
16
detected
123,500
people served
4
health-based violations
New Hampshire rankingsLead in New HampshirePFAS in New Hampshire
Water source
Surface water
Ownership
Local government
Counties served
Hillsborough

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.

4
health-based violations
6
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2013-07-01 → 2013-07-31
MCL Health-based Resolved 2013-07-01 → 2013-07-31
MCL Health-based Resolved 2013-07-01 → 2013-07-31
MCL Health-based Resolved 2013-07-01 → 2013-07-31
MR Monitoring Resolved 2006-12-01 → 2006-12-31
MR Monitoring Resolved 2006-12-01 → 2006-12-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFOA 0.0050 µg/L 4/4 2023

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
Chloroform
3.735 µg/L
No EPA limit set
worst single sample: 16 µg/L
174/175 SYR4 2014–2019
TTHM
6.07 µg/L 7.6%
of the EPA limit 80 µg/L
worst single sample: 22 µg/L
174/175 SYR4 2014–2019
Bromodichloromethane
1.8 µg/L
No EPA limit set
worst single sample: 5 µg/L
173/175 SYR4 2014–2019
Dichloroacetic Acid
8.085 µg/L
No EPA limit set
worst single sample: 9 µg/L
164/167 SYR4 2014–2019
Total Haloacetic Acids (HAA5)
11.445 µg/L 19%
of the EPA limit 60 µg/L
worst single sample: 16 µg/L
164/167 SYR4 2014–2019
Dibromochloromethane
0.9700 µg/L
No EPA limit set
worst single sample: 1.1 µg/L
147/175 SYR4 2014–2019
Copper
46.45 µg/L 3.6%
of the EPA limit 1300 µg/L
worst single sample: 450 µg/L
135/141 SYR4 2014–2019
Lead
36.7 µg/L 245%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 49.2 µg/L
21/141 SYR4 2014–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 16/16 LCR 2024
Trichloroacetic Acid
6.8 µg/L
No EPA limit set
 13/167 SYR4 2014–2019
Barium
16.3428 µg/L 0.8%
of the EPA limit 2000 µg/L
worst single sample: 16.5813 µg/L
8/8 SYR4 2014–2019
Fluoride
678.5 µg/L 17%
of the EPA limit 4000 µg/L
worst single sample: 710 µg/L
8/8 SYR4 2014–2019
Combined Radium (-226 And -228)
1.53 pCi/L 31%
of the EPA limit 5 pCi/L
worst single sample: 1.6 pCi/L
2/2 SYR4 2014–2017
Nitrate
220 µg/L 2.2%
of the EPA limit 10000 µg/L
 2/18 SYR4 2014–2019
Gross Beta Particle Activity
1.7 pCi/L
No EPA limit set
 1/1 SYR4 2017
93 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, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebDiquatEthylene DibromideEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
PHILLIP CROASDALE

Frequently asked questions about Manchester Water Works

Is Manchester Water Works tap water safe to drink?

EPA monitoring detected 16 contaminants in Manchester 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 Manchester Water Works's water?

EPA monitoring detected Chloroform, TTHM, Bromodichloromethane, 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 Manchester Water Works serve?

Manchester Water Works reports serving 123,500 people in New Hampshire, per its EPA record.

Has Manchester Water Works had any water quality violations?

The EPA has 6 violations on file for Manchester Water Works, of which 4 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.