Is Leominster Water Division 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

322

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2018-10-01 → 2018-12-31
MCL	Health-based	Resolved	2018-10-01 → 2018-12-31
MCL	Health-based	Resolved	2018-07-01 → 2018-09-30
MCL	Health-based	Resolved	2018-07-01 → 2018-09-30
MCL	Health-based	Resolved	2012-07-01 → 2012-07-31
MCL	Health-based	Resolved	2012-07-01 → 2012-07-31
MCL	Health-based	Resolved	2008-08-01 → 2008-08-31
MCL	Health-based	Resolved	2008-08-01 → 2008-08-31
MCL	Health-based	Archived	2007-07-01 → 2007-09-30
MCL	Health-based	Archived	2007-07-01 → 2007-09-30

PFAS detected

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

Contaminant	Max	Detection rate	Period
PFOA	0.0043 µg/L	1/14	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
Total Haloacetic Acids (HAA5)	87.64 µg/L 146% of the EPA limit, at the 95th percentile of samples — 60 µg/L worst single sample: 171 µg/L	225/229	SYR4	2012–2019
Dichloroacetic Acid	28.35 µg/L No EPA limit set worst single sample: 61 µg/L	212/218	SYR4	2012–2019
Trichloroacetic Acid	58.8 µg/L No EPA limit set worst single sample: 110 µg/L	209/218	SYR4	2012–2019
TTHM	98.9 µg/L 124% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 148 µg/L	203/205	SYR4	2012–2019
Bromodichloromethane	11 µg/L No EPA limit set worst single sample: 70 µg/L	198/201	SYR4	2012–2019
Chloroform	86.15 µg/L No EPA limit set worst single sample: 130 µg/L	198/201	SYR4	2012–2019
Monochloroacetic Acid	4.4 µg/L No EPA limit set worst single sample: 7.4 µg/L	92/212	SYR4	2012–2019
Dibromochloromethane	1.9 µg/L No EPA limit set worst single sample: 2.8 µg/L	71/201	SYR4	2012–2019
Nitrate	519 µg/L 5.2% of the EPA limit 10000 µg/L worst single sample: 610 µg/L	28/64	SYR4	2012–2019
Lead	0.0028 mg/L 19% of the EPA limit 0.0150 mg/L	27/27	LCR	2025
Barium	13.5 µg/L 0.7% of the EPA limit 2000 µg/L worst single sample: 15 µg/L	26/27	SYR4	2012–2019
Dibromoacetic Acid	1.55 µg/L No EPA limit set worst single sample: 1.7 µg/L	11/205	SYR4	2012–2019
Atrazine	0.2255 µg/L 7.5% of the EPA limit 3 µg/L worst single sample: 0.2300 µg/L	10/28	SYR4	2012–2019
Bromoform	1.185 µg/L No EPA limit set worst single sample: 1.2 µg/L	4/201	SYR4	2012–2019

87 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, TotalArsenicAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneFluorideHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: MARK F PIERMARINI
Phone: 9785347590
Email: [email protected]

Frequently asked questions about Leominster Water Division

Is Leominster Water Division tap water safe to drink?

EPA monitoring detected 15 contaminants in Leominster Water Division'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 Leominster Water Division's water?

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

How many people does Leominster Water Division serve?

Leominster Water Division reports serving 41,683 people in Massachusetts, per its EPA record.

Has Leominster Water Division had any water quality violations?

The EPA has 322 violations on file for Leominster Water Division, of which 27 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.