CHELSEA, MA · Suffolk County
MWRA Water System
Consumer Confidence Report status
MWRA must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for MWRA.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Massachusetts’s official records. Always confirm current status with Massachusetts before making decisions based on this information.
System facts
- System ID (PWSID)
- MA6000000
- System type
- Community Water System
- Population served
- 2,580,000
- Service connections
- 186
- Ownership
- state government
- Water source
- surface water (rivers, lakes, or reservoirs)
MWRA is the largest community water system in Massachusetts, serving 2,580,000 people from surface water.
As of August 1, 2026, EPA's published records contain no violations for this system.
Violation history
No violations on record for this system.
Enforcement actions
No enforcement actions on record for this system.
Common questions
Is MWRA required to publish a Consumer Confidence Report?
- Yes. MWRA is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is MWRA’s next Consumer Confidence Report due?
- MWRA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does MWRA have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for MWRA.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
MWRA
6172426000
CHELSEA, MA 02150