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Billerica Water Works

EPA monitoring tested this supplier for 103 contaminants and detected 27. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

103
contaminants tested
27
detected
42,119
people served
9
health-based violations
Massachusetts rankingsLead in MassachusettsPFAS in Massachusetts
Water source
Surface water
Ownership
Local government
Counties served
Middlesex

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.

9
health-based violations
36
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2023-04-01 → 2023-06-30
MCL Health-based Resolved 2023-04-01 → 2023-06-30
MCL Health-based Archived 2023-01-01 → 2023-03-31
MCL Health-based Archived 2023-01-01 → 2023-03-31
MCL Health-based Archived 2022-10-01 → 2022-12-31
MCL Health-based Archived 1998-01-01 → 1998-12-31
MCL Health-based Archived 1997-10-01 → 1998-09-30
MCL Health-based Archived 1995-10-01 → 1995-10-31
MCL Health-based Archived 1995-07-01 → 1995-07-31
MR Monitoring Resolved 2014-01-01 → 2014-03-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfhxa 0.0061 µg/L 3/4 2025
Pfpea 0.0080 µg/L 3/4 2025
Pfba 0.0055 µg/L 2/4 2025
PFBS 0.0031 µg/L 2/4 2025
PFOA 0.0055 µg/L 2/4 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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Total Haloacetic Acids (HAA5)
24.625 µg/L 41%
of the EPA limit 60 µg/L
worst single sample: 33 µg/L
116/118 SYR4 2012–2019
TTHM
50.9 µg/L 64%
of the EPA limit 80 µg/L
worst single sample: 80 µg/L
112/112 SYR4 2012–2019
Bromodichloromethane
18.815 µg/L
No EPA limit set
worst single sample: 28 µg/L
80/80 SYR4 2012–2019
Chloroform
26 µg/L
No EPA limit set
worst single sample: 28 µg/L
80/80 SYR4 2012–2019
Dibromochloromethane
18.1 µg/L
No EPA limit set
worst single sample: 22 µg/L
80/80 SYR4 2012–2019
Dichloroacetic Acid
13.61 µg/L
No EPA limit set
worst single sample: 22 µg/L
74/76 SYR4 2012–2019
Nitrate
710 µg/L 7.1%
of the EPA limit 10000 µg/L
worst single sample: 790 µg/L
68/68 SYR4 2012–2019
Bromoform
3.98 µg/L
No EPA limit set
worst single sample: 6.7 µg/L
67/80 SYR4 2012–2019
Dibromoacetic Acid
3.4 µg/L
No EPA limit set
worst single sample: 8.5 µg/L
66/76 SYR4 2012–2019
Trichloroacetic Acid
6.475 µg/L
No EPA limit set
worst single sample: 7.3 µg/L
66/76 SYR4 2012–2019
Bromate
9.73 µg/L 97%
of the EPA limit 10 µg/L
worst single sample: 50 µg/L
63/75 SYR4 2012–2019
Monochloroacetic Acid
6.2 µg/L
No EPA limit set
worst single sample: 6.7 µg/L
41/76 SYR4 2012–2019
Nitrite
205 µg/L 21%
of the EPA limit 1000 µg/L
worst single sample: 280 µg/L
16/33 SYR4 2012–2019
Lead
0.0024 mg/L 16%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2025
Fluoride
1130 µg/L 28%
of the EPA limit 4000 µg/L
worst single sample: 1200 µg/L
8/8 SYR4 2012–2019
Monobromoacetic Acid
1.03 µg/L
No EPA limit set
worst single sample: 1.1 µg/L
8/76 SYR4 2012–2019
Barium
32.5 µg/L 1.6%
of the EPA limit 2000 µg/L
worst single sample: 33 µg/L
6/6 SYR4 2012–2019
Chromium
2.26 µg/L 2.3%
of the EPA limit 100 µg/L
worst single sample: 2.3 µg/L
2/7 SYR4 2012–2019
Arsenic
1.7 µg/L 17%
of the EPA limit 10 µg/L
 1/7 SYR4 2012–2019
Cyanide
16 µg/L 8%
of the EPA limit 200 µg/L
 1/7 SYR4 2012–2019
Dichloromethane
7.6 µg/L 152%
of the EPA limit, at the 95th percentile of samples — 5 µg/L
 1/33 SYR4 2012–2019
Selenium
1.5 µg/L 3%
of the EPA limit 50 µg/L
 1/7 SYR4 2012–2019
76 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, TotalChlorobenzeneCopperCadmiumCarbofuranCarbon TetrachlorideChlordaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
TODD A MELANSON
Phone
9786710957
Email
[email protected]

Frequently asked questions about Billerica Water Works

Is Billerica Water Works tap water safe to drink?

EPA monitoring detected 27 contaminants in Billerica 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 Billerica Water Works's water?

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

How many people does Billerica Water Works serve?

Billerica Water Works reports serving 42,119 people in Massachusetts, per its EPA record.

Has Billerica Water Works had any water quality violations?

The EPA has 36 violations on file for Billerica Water Works, of which 9 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.