Is Mwra Tap Water Safe? Quality Report

Water source: Surface water
Ownership: State government
Counties served: Suffolk

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

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Archived	1992-01-01 → 2000-05-05
MR	Monitoring	Archived	2001-01-01 → 2001-03-31
MR	Monitoring	Archived	2001-01-01 → 2001-03-31

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	490 µg/L 4.9% of the EPA limit 10000 µg/L worst single sample: 650 µg/L	1514/1540	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	17.752 µg/L 30% of the EPA limit 60 µg/L worst single sample: 24.4 µg/L	1080/1085	SYR4	2012–2019
Bromodichloromethane	4.322 µg/L No EPA limit set worst single sample: 5.37 µg/L	1037/1037	SYR4	2012–2019
Chloroform	16.92 µg/L No EPA limit set worst single sample: 23.2 µg/L	1037/1037	SYR4	2012–2019
TTHM	22.02 µg/L 28% of the EPA limit 80 µg/L worst single sample: 29.7 µg/L	1037/1037	SYR4	2012–2019
Dichloroacetic Acid	13.85 µg/L No EPA limit set worst single sample: 20.6 µg/L	951/958	SYR4	2012–2019
Dibromochloromethane	1.1575 µg/L No EPA limit set worst single sample: 1.39 µg/L	906/1036	SYR4	2012–2019
Trichloroacetic Acid	2.347 µg/L No EPA limit set worst single sample: 9.97 µg/L	354/955	SYR4	2012–2019
Monochloroacetic Acid	4.02 µg/L No EPA limit set worst single sample: 5.83 µg/L	221/947	SYR4	2012–2019
Barium	10.85 µg/L 0.5% of the EPA limit 2000 µg/L worst single sample: 11 µg/L	64/64	SYR4	2012–2019
Lead	0.0059 mg/L 39% of the EPA limit 0.0150 mg/L	44/44	LCR	2025
Fluoride	992.9 µg/L 25% of the EPA limit 4000 µg/L worst single sample: 1020 µg/L	40/64	SYR4	2012–2019
Copper	5.15 µg/L 0.4% of the EPA limit 1300 µg/L worst single sample: 5.2 µg/L	11/79	SYR4	2012–2019
Nitrite	6.365 µg/L 0.6% of the EPA limit 1000 µg/L worst single sample: 6.4 µg/L	8/60	SYR4	2012–2019
Arsenic	0.4600 µg/L 4.6% of the EPA limit 10 µg/L	1/62	SYR4	2012–2019
Bromate	15.6 µg/L 156% of the EPA limit, at the 95th percentile of samples — 10 µg/L	1/185	SYR4	2012–2019
Di(2-ethylhexyl) Phthalate	1.1 µg/L 18% of the EPA limit 6 µg/L	1/11	SYR4	2013–2019
Dibromoacetic Acid	1.8 µg/L No EPA limit set	1/946	SYR4	2012–2019
Mercury	0.0120 µg/L 0.6% of the EPA limit 2 µg/L	1/64	SYR4	2012–2019

52 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorMonobromoacetic AcidOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: VALERIE MORAN
Phone: 6172426000
Email: [email protected]

Frequently asked questions about Mwra

Is Mwra tap water safe to drink?

EPA monitoring detected 19 contaminants in Mwra'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 Mwra's water?

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

How many people does Mwra serve?

Mwra reports serving 2,580,000 people in Massachusetts, per its EPA record.

Has Mwra had any water quality violations?

The EPA has 3 violations on file for Mwra, of which 1 is 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.