Is Peterborough Water Works Tap Water Safe? Quality Report

Water source: Ground 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.

health-based violations

125

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2012-07-01 → 2012-07-31
MCL	Health-based	Resolved	2012-07-01 → 2012-07-31
MCL	Health-based	Resolved	2012-07-01 → 2012-07-31
MCL	Health-based	Resolved	2012-07-01 → 2012-07-31
MCL	Health-based	Resolved	2009-10-01 → 2009-10-31
MCL	Health-based	Resolved	2009-10-01 → 2009-10-31
MCL	Health-based	Resolved	2009-10-01 → 2009-10-31
MCL	Health-based	Resolved	2009-10-01 → 2009-10-31
MCL	Health-based	Resolved	2007-10-01 → 2007-10-31
MCL	Health-based	Resolved	2007-10-01 → 2007-10-31

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	566 µg/L 44% of the EPA limit 1300 µg/L worst single sample: 1020 µg/L	152/158	SYR4	2015–2019
Lead	21.9 µg/L 146% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 78 µg/L	46/152	SYR4	2016–2019
Lead	0.0090 mg/L 60% of the EPA limit 0.0150 mg/L	21/21	LCR	2024
Dibromochloromethane	4.02 µg/L No EPA limit set worst single sample: 5.1 µg/L	10/20	SYR4	2015–2019
TTHM	11.645 µg/L 15% of the EPA limit 80 µg/L worst single sample: 14.3 µg/L	10/10	SYR4	2015–2019
Bromodichloromethane	2.53 µg/L No EPA limit set worst single sample: 2.6 µg/L	8/20	SYR4	2015–2019
Bromoform	4.825 µg/L No EPA limit set worst single sample: 5.7 µg/L	8/20	SYR4	2015–2019
Chloroform	1.74 µg/L No EPA limit set worst single sample: 1.9 µg/L	5/20	SYR4	2015–2019
Combined Radium (-226 And -228)	1.1 pCi/L 22% of the EPA limit 5 pCi/L	1/5	SYR4	2014–2017

92 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-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneFluorideGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitrateNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: SETH MACLEAN

Frequently asked questions about Peterborough Water Works

Is Peterborough Water Works tap water safe to drink?

EPA monitoring detected 9 contaminants in Peterborough 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 Peterborough Water Works's water?

EPA monitoring detected Copper, Lead, Lead, Dibromochloromethane, TTHM, and others. The full list with the level and data source for each is above.

How many people does Peterborough Water Works serve?

Peterborough Water Works reports serving 4,500 people in New Hampshire, per its EPA record.

Has Peterborough Water Works had any water quality violations?

The EPA has 125 violations on file for Peterborough Water Works, of which 47 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.