Public water system record
Winthrop Water Division, (MWRA)
Serves Winthrop Town, Suffolk County, MA · 19,316 people served
Federal records show no health-based violations and 1 monitoring/reporting issue for Winthrop Water Division, (MWRA) in the last ten years. At least one of these issues remains unresolved.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- Winthrop Water Division, (MWRA) buys its water from MWRA.
- Most recent formal enforcement: compliance order (no penalty) by Massachusetts, November 2024.
- Record on file since 1982, with 8 health-based violations before October 19, 2016.
- Lead pipe inventory: 539 lead and 0 unknown out of 4,541 service lines.
Check whether Winthrop Water Division, (MWRA) serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2024 |
Active
Enforcement action in place
|
Full record since 1982
EPA's records for Winthrop Water Division, (MWRA) go back to 1982. Before October 19, 2016 they list 8 health-based violations (6 resolved, 2 archived by EPA without a recorded fix) and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 1 |
| 1990s | 4 | 0 |
| 2000s | 2 | 0 |
| 2010 to October 18, 2016 | 2 | 0 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began October 2015, Archived.
Show all 8 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2015 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 2011 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 2007 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 2001 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1994 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1993 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jan 1, 1992 | Archived |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1992 | Resolved |
Enforcement actions
Massachusetts regulators took 5 formal enforcement actions against Winthrop Water Division, (MWRA) between 2002 and 2024. The most recent was a compliance order (no penalty) in November 2024.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Nov 7, 2024 | Massachusetts | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
| Nov 13, 2015 | Massachusetts | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| May 9, 2011 | Massachusetts | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Jul 7, 2008 | Massachusetts | Compliance order (no penalty) | 1 violation (1 health-based): Lead and Copper Rule |
| Mar 12, 2002 | Massachusetts | Compliance order (no penalty) | 1 violation (1 health-based): Lead and Copper Rule |
Where the water comes from
Winthrop Water Division, (MWRA) buys its water from MWRA. It lists no wells or intakes of its own.
Buys water from
- MWRA Chelsea, MA
Annual water quality report
Winthrop Water Division, (MWRA) must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Massachusetts.
Certified drinking water labs by state EPA guidance for private wells