Public water system record
Watertown Water Dept. (MWRA)
Serves Watertown, Middlesex County, MA · 35,329 people served
Federal records show no health-based violations and 1 monitoring/reporting issue for Watertown Water Dept. (MWRA) in the last ten years.
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
- Watertown Water Dept. (MWRA) buys its water from MWRA.
- Most recent formal enforcement: compliance order (no penalty) by Massachusetts, February 2022.
- Record on file since 1992, with 5 health-based violations before October 19, 2016.
- Lead pipe inventory: 21 lead and 0 unknown out of 7,662 service lines.
Check whether Watertown Water Dept. (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 |
|---|---|---|
|
Revised Total Coliform Rule
Monitoring violation
|
Aug 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Full record since 1992
EPA's records for Watertown Water Dept. (MWRA) go back to 1992. Before October 19, 2016 they list 5 health-based violations (4 resolved, 1 archived by EPA without a recorded fix) and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 5 | 1 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Lead and Copper Rule, began January 1996, Resolved.
Show all 5 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1996 | 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 Watertown Water Dept. (MWRA) between 1993 and 2022. The most recent was a compliance order (no penalty) in February 2022.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Feb 11, 2022 | Massachusetts | Compliance order (no penalty) | 1 violation: Revised Total Coliform Rule |
| Nov 19, 1997 | Massachusetts | Compliance order with a penalty | 1 violation (1 health-based): Lead and Copper Rule |
| Mar 9, 1997 | Massachusetts | Compliance order (no penalty) | 1 violation (1 health-based): Lead and Copper Rule |
| Jul 18, 1996 | Massachusetts | Compliance order (no penalty) | 1 violation: Asbestos |
| Jun 29, 1993 | Massachusetts | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
Where the water comes from
Watertown Water Dept. (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
Watertown Water Dept. (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