Is Westborough Water Department Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: Worcester

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

126

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2025-11-01 → 2025-11-30
TT	Health-based	Resolved	2025-11-01 → 2025-11-30
MCL	Health-based	Resolved	2016-02-01 → 2016-02-29
MCL	Health-based	Resolved	2016-02-01 → 2016-02-29
MCL	Health-based	Resolved	2013-08-01 → 2013-08-31
MCL	Health-based	Resolved	2013-08-01 → 2013-08-31
MCL	Health-based	Resolved	2013-08-01 → 2013-08-31
MCL	Health-based	Resolved	2013-08-01 → 2013-08-31
MCL	Health-based	Resolved	2013-06-01 → 2013-06-30
MCL	Health-based	Resolved	2013-06-01 → 2013-06-30

PFAS detected

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

Contaminant	Max	Detection rate	Period
PFOA	0.0058 µg/L	2/12	2024
PFBS	0.0034 µg/L	1/12	2024
PFOS	0.0075 µg/L	1/12	2024

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	1500 µg/L 15% of the EPA limit 10000 µg/L worst single sample: 2100 µg/L	176/204	SYR4	2012–2019
Bromodichloromethane	17 µg/L No EPA limit set worst single sample: 26 µg/L	164/164	SYR4	2012–2019
Chloroform	38.85 µg/L No EPA limit set worst single sample: 65 µg/L	164/164	SYR4	2012–2019
Dibromochloromethane	8.585 µg/L No EPA limit set worst single sample: 9.7 µg/L	164/164	SYR4	2012–2019
TTHM	63.415 µg/L 79% of the EPA limit 80 µg/L worst single sample: 100.6 µg/L	164/164	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	22.045 µg/L 37% of the EPA limit 60 µg/L worst single sample: 39.2 µg/L	158/164	SYR4	2012–2019
Dichloroacetic Acid	12 µg/L No EPA limit set worst single sample: 22 µg/L	154/164	SYR4	2012–2019
Trichloroacetic Acid	9.72 µg/L No EPA limit set worst single sample: 37 µg/L	150/164	SYR4	2012–2019
Dibromoacetic Acid	2.395 µg/L No EPA limit set worst single sample: 3.5 µg/L	82/164	SYR4	2012–2019
Bromoform	1.59 µg/L No EPA limit set worst single sample: 2.4 µg/L	55/164	SYR4	2012–2019
Barium	52.35 µg/L 2.6% of the EPA limit 2000 µg/L worst single sample: 68 µg/L	40/43	SYR4	2012–2018
Arsenic	21 µg/L 210% of the EPA limit, at the 95th percentile of samples — 10 µg/L worst single sample: 24 µg/L	27/101	SYR4	2012–2019
Fluoride	1140 µg/L 28% of the EPA limit 4000 µg/L worst single sample: 1200 µg/L	27/44	SYR4	2012–2018
Lead	0.0018 mg/L 12% of the EPA limit 0.0150 mg/L	18/18	LCR	2026
Monochloroacetic Acid	3.675 µg/L No EPA limit set worst single sample: 4 µg/L	14/164	SYR4	2012–2019
Copper	71.05 µg/L 5.5% of the EPA limit 1300 µg/L worst single sample: 79 µg/L	4/11	SYR4	2012–2015
Selenium	4.9 µg/L 9.8% of the EPA limit 50 µg/L worst single sample: 5 µg/L	3/51	SYR4	2012–2018
cis-1,2-Dichloroethylene	0.5100 µg/L 0.7% of the EPA limit 70 µg/L	1/112	SYR4	2012–2019

81 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 EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, TotalLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: ANDREW DEVRIES
Phone: 5083663070
Email: [email protected]

Frequently asked questions about Westborough Water Department

Is Westborough Water Department tap water safe to drink?

EPA monitoring detected 21 contaminants in Westborough 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 Westborough Water Department's water?

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

How many people does Westborough Water Department serve?

Westborough Water Department reports serving 21,567 people in Massachusetts, per its EPA record.

Has Westborough Water Department had any water quality violations?

The EPA has 126 violations on file for Westborough Water Department, of which 17 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.