Is Medway Water Department Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Norfolk

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

358

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2014-08-01 → 2014-08-31
MCL	Health-based	Resolved	2014-08-01 → 2014-08-31
MCL	Health-based	Resolved	2008-08-01 → 2008-08-31
MCL	Health-based	Resolved	2008-08-01 → 2008-08-31
MCL	Health-based	Resolved	2008-08-01 → 2008-08-31
MCL	Health-based	Resolved	2008-08-01 → 2008-08-31
MCL	Health-based	Archived	2006-12-01 → 2006-12-31
MCL	Health-based	Archived	2006-11-01 → 2006-11-30
MCL	Health-based	Archived	2006-10-01 → 2006-10-31
MCL	Health-based	Resolved	2006-07-01 → 2006-07-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
PFOA	0.0072 µg/L	4/4	2025
Pfpea	0.0038 µg/L	2/4	2025
PFBS	0.0030 µg/L	1/4	2025
Pfhxa	0.0031 µg/L	1/4	2025

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
Bromodichloromethane	14.05 µg/L No EPA limit set worst single sample: 21 µg/L	120/121	SYR4	2012–2019
Dibromochloromethane	16 µg/L No EPA limit set worst single sample: 17 µg/L	120/121	SYR4	2012–2019
TTHM	43.605 µg/L 55% of the EPA limit 80 µg/L worst single sample: 64 µg/L	120/121	SYR4	2012–2019
Chloroform	17 µg/L No EPA limit set worst single sample: 31 µg/L	117/121	SYR4	2012–2019
Bromoform	6.85 µg/L No EPA limit set worst single sample: 9.8 µg/L	116/121	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	15.87 µg/L 26% of the EPA limit 60 µg/L worst single sample: 29 µg/L	114/123	SYR4	2012–2019
Dibromoacetic Acid	4.035 µg/L No EPA limit set worst single sample: 4.6 µg/L	94/121	SYR4	2012–2019
Dichloroacetic Acid	5.46 µg/L No EPA limit set worst single sample: 10 µg/L	79/121	SYR4	2012–2019
Trichloroacetic Acid	10.395 µg/L No EPA limit set worst single sample: 19 µg/L	72/121	SYR4	2012–2019
Nitrate	2670 µg/L 27% of the EPA limit 10000 µg/L worst single sample: 2900 µg/L	64/64	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	19/19	LCR	2025
Monochloroacetic Acid	7.7 µg/L No EPA limit set worst single sample: 8.1 µg/L	11/121	SYR4	2012–2019
Barium	370.45 µg/L 19% of the EPA limit 2000 µg/L worst single sample: 375 µg/L	8/8	SYR4	2012–2018
Fluoride	1063.5 µg/L 27% of the EPA limit 4000 µg/L worst single sample: 1130 µg/L	8/8	SYR4	2012–2018
Monobromoacetic Acid	3.56 µg/L No EPA limit set worst single sample: 3.7 µg/L	5/121	SYR4	2012–2019
Arsenic	2 µg/L 20% of the EPA limit 10 µg/L	2/8	SYR4	2012–2018
Selenium	4 µg/L 8% of the EPA limit 50 µg/L	2/8	SYR4	2012–2018
Tetrachloroethylene	0.6000 µg/L 12% of the EPA limit 5 µg/L	1/32	SYR4	2012–2019

79 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, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: DONALD L COOPER
Phone: 5085333275
Email: [email protected]

Frequently asked questions about Medway Water Department

Is Medway Water Department tap water safe to drink?

EPA monitoring detected 22 contaminants in Medway Water Department'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 Medway Water Department's water?

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

How many people does Medway Water Department serve?

Medway Water Department reports serving 14,176 people in Massachusetts, per its EPA record.

Has Medway Water Department had any water quality violations?

The EPA has 358 violations on file for Medway Water Department, of which 22 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.