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Tap water quality report

Chelsea Water Dept. (Mwra)

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
40,787
people served
30
health-based violations
Massachusetts rankingsLead in MassachusettsPFAS in Massachusetts
Water source
SWP
Ownership
Local government
Counties served
Suffolk

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.

30
health-based violations
32
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2010-01-01
TT Health-based Resolved 2010-01-01
TT Health-based Resolved 2007-01-01
TT Health-based Resolved 2007-01-01
TT Health-based Resolved 1999-01-01
TT Health-based Resolved 1999-01-01
TT Health-based Resolved 1997-01-01
TT Health-based Resolved 1997-01-01
MCL Health-based Archived 1996-07-01 → 1996-07-31
MCL Health-based Archived 1995-11-01 → 1995-11-30

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
0.0024 mg/L 16%
of the EPA limit 0.0150 mg/L
 43/43 LCR 2025
30 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaHfpo-DaNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact
CHRISTOPHER BARRETT
Phone
6174664200
Email
[email protected]

Frequently asked questions about Chelsea Water Dept. (Mwra)

Is Chelsea Water Dept. (Mwra) tap water safe to drink?

EPA monitoring detected 1 contaminant in Chelsea Water Dept. (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 Chelsea Water Dept. (Mwra)'s water?

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

How many people does Chelsea Water Dept. (Mwra) serve?

Chelsea Water Dept. (Mwra) reports serving 40,787 people in Massachusetts, per its EPA record.

Has Chelsea Water Dept. (Mwra) had any water quality violations?

The EPA has 32 violations on file for Chelsea Water Dept. (Mwra), of which 30 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.