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Tap water quality report

Marlborough Dpw Water Div. (Mwra)

EPA monitoring tested this supplier for 103 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

103
contaminants tested
15
detected
41,799
people served
7
health-based violations
Massachusetts rankingsLead in MassachusettsPFAS in Massachusetts
Water source
SWP
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.

7
health-based violations
37
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2004-07-01 → 2004-07-31
MCL Health-based Resolved 2004-07-01 → 2004-07-31
MCL Health-based Resolved 1998-09-01 → 1998-09-30
MCL Health-based Resolved 1998-09-01 → 1998-09-30
MCL Health-based Resolved 1996-06-01 → 1996-06-30
MCL Health-based Resolved 1994-09-01 → 1994-09-30
MCL Health-based Archived 1993-05-01 → 1993-05-31
MR Monitoring Resolved 2020-12-30
MR Monitoring Resolved 2020-12-30
MR Monitoring Resolved 2020-07-01

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)
24.5 µg/L 41%
of the EPA limit 60 µg/L
worst single sample: 31 µg/L
111/111 SYR4 2012–2019
TTHM
48 µg/L 60%
of the EPA limit 80 µg/L
worst single sample: 84 µg/L
110/110 SYR4 2012–2019
Copper
68.2 µg/L 5.2%
of the EPA limit 1300 µg/L
worst single sample: 190 µg/L
57/57 SYR4 2016
Lead
26.6 µg/L 177%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 540 µg/L
52/57 SYR4 2016
Lead
0.0033 mg/L 22%
of the EPA limit 0.0150 mg/L
 34/34 LCR 2025
Nitrate
400 µg/L 4%
of the EPA limit 10000 µg/L
 10/10 SYR4 2012–2016
Bromodichloromethane
3.1865 µg/L
No EPA limit set
worst single sample: 3.19 µg/L
8/8 SYR4 2018–2019
Chloroform
9.86 µg/L
No EPA limit set
worst single sample: 10 µg/L
8/8 SYR4 2018–2019
Dibromochloromethane
0.9465 µg/L
No EPA limit set
worst single sample: 0.9500 µg/L
8/8 SYR4 2018–2019
Dichloroacetic Acid
13.65 µg/L
No EPA limit set
worst single sample: 14 µg/L
8/8 SYR4 2018–2019
Monochloroacetic Acid
4.295 µg/L
No EPA limit set
worst single sample: 4.4 µg/L
8/8 SYR4 2018–2019
Trichloroacetic Acid
1.7755 µg/L
No EPA limit set
worst single sample: 1.8 µg/L
8/8 SYR4 2018–2019
Barium
36.8 µg/L 1.8%
of the EPA limit 2000 µg/L
worst single sample: 39 µg/L
5/5 SYR4 2012–2016
Fluoride
1000 µg/L 25%
of the EPA limit 4000 µg/L
 5/5 SYR4 2012–2016
Monobromoacetic Acid
0.9095 µg/L
No EPA limit set
worst single sample: 0.9200 µg/L
2/8 SYR4 2018–2019
88 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, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MATTHEW J SANTELLA
Phone
5086246910
Email
[email protected]

Frequently asked questions about Marlborough Dpw Water Div. (Mwra)

Is Marlborough Dpw Water Div. (Mwra) tap water safe to drink?

EPA monitoring detected 15 contaminants in Marlborough Dpw Water Div. (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 Marlborough Dpw Water Div. (Mwra)'s water?

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

How many people does Marlborough Dpw Water Div. (Mwra) serve?

Marlborough Dpw Water Div. (Mwra) reports serving 41,799 people in Massachusetts, per its EPA record.

Has Marlborough Dpw Water Div. (Mwra) had any water quality violations?

The EPA has 37 violations on file for Marlborough Dpw Water Div. (Mwra), of which 7 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.