Drinking water quality · 2025
What's in Boston Water and Sewer Commission (mwra), MA tap water
1 contaminants were measured in the Boston Water and Sewer Commission (mwra), MA water system's 2025 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2025
- Contaminants measured
- 1
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- Lead
- Service area
- MA
Where your water comes from · EPA SDWIS
Boston Water and Sewer Commission (mwra), MA buys its drinking water from MWRA.
Source
Treatment
Distribution
Also buys water from MWRA.
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Treatment technique violationHealth-based2 violations on record · most recent Nov 20201 open
- Maximum contaminant level exceededHealth-based2 violations on record · most recent Jul 1996resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.0225 mg/L90th percentileAt the tap | 0.015 mg/LAction level | At or above the limit |
People also ask about Boston Water and Sewer Commission (mwra), MA's water
+Is Boston Water and Sewer Commission (mwra), MA tap water safe to drink in 2025?
The 2025 Consumer Confidence Report for the Boston Water and Sewer Commission (mwra), MA water utility lists 1 contaminant at or above the federal limit: Lead. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in Boston Water and Sewer Commission (mwra), MA tap water?
1 contaminants were measured in Boston Water and Sewer Commission (mwra), MA's 2025 Consumer Confidence Report, spanning metals. 1 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in Boston Water and Sewer Commission (mwra), MA tap water?
One contaminant in Boston Water and Sewer Commission (mwra), MA's 2025 report sits at or above the federal limit: Lead (1.5× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in Boston Water and Sewer Commission (mwra), MA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2025 report is Lead, at 1.5× the federal threshold. It belongs to the metals family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Boston Water and Sewer Commission (mwra), MA's 2025 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Boston Water and Sewer Commission (mwra), MA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2025 report; a new report will replace it once the utility publishes its next annual update.