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Tap water quality report

Watertown Department of Public Works

EPA monitoring tested this supplier for 31 contaminants and detected 1. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

31
contaminants tested
1
detected
35,985
people served
11
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.

11
health-based violations
13
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 1996-01-01
TT Health-based Resolved 1996-01-01
TT Health-based Resolved 1996-01-01
TT Health-based Resolved 1996-01-01
TT Health-based Resolved 1994-01-01
TT Health-based Resolved 1994-01-01
TT Health-based Resolved 1993-01-01
TT Health-based Resolved 1993-01-01
TT Health-based Resolved 1992-01-01
TT Health-based Resolved 1992-01-01

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
Lead
0.0011 mg/L 7.1%
of the EPA limit 0.0150 mg/L
 38/38 LCR 2025
30 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaHfpo-DaNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact
MATTHEW E BAKER
Phone
6179726420
Email
[email protected]

Frequently asked questions about Watertown Department of Public Works

Is Watertown Department of Public Works tap water safe to drink?

EPA monitoring detected 1 contaminant in Watertown Department of Public 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 Watertown Department of Public Works's water?

EPA monitoring detected Lead. The full list with the level and data source for each is above.

How many people does Watertown Department of Public Works serve?

Watertown Department of Public Works reports serving 35,985 people in Massachusetts, per its EPA record.

Has Watertown Department of Public Works had any water quality violations?

The EPA has 13 violations on file for Watertown Department of Public Works, of which 11 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.