Public water system record
Waltham Water Department
Serves Waltham, Middlesex County, MA · 65,218 people served
Federal records show no health-based violations and 1 monitoring/reporting issue for Waltham Water Department 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
- Waltham Water Department buys its water from MWRA.
- Most recent formal enforcement: compliance order (no penalty) by Massachusetts, March 2026.
- Record on file since 1991, with 11 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 14,226 service lines.
Check whether Waltham Water Department 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, 2025 |
Active
Enforcement action in place
|
Full record since 1991
EPA's records for Waltham Water Department go back to 1991. Before October 19, 2016 they list 11 health-based violations (10 resolved, 1 archived by EPA without a recorded fix) and 2 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 8 | 0 |
| 2000s | 0 | 1 |
| 2010 to October 18, 2016 | 3 | 1 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began September 2013, Resolved.
Show all 11 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2013 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2012 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2012 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1999 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jan 1, 1997 | 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 |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Jul 1, 1991 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1991 | Resolved |
Enforcement actions
Massachusetts regulators took 7 formal enforcement actions against Waltham Water Department between 1993 and 2026. The most recent was a compliance order (no penalty) in March 2026.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Mar 11, 2026 | Massachusetts | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
| Sep 13, 2012 | Massachusetts | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Aug 27, 2012 | Massachusetts | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Jun 24, 2008 | Massachusetts | Compliance order (no penalty) | 1 violation: Total Coliform |
| Feb 10, 2000 | Massachusetts | Compliance order (no penalty) | 1 violation (1 health-based): Lead and Copper Rule |
| Feb 17, 1998 | Massachusetts | Compliance order (no penalty) | 1 violation (1 health-based): Lead and Copper Rule |
| Jun 29, 1993 | Massachusetts | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
Where the water comes from
Waltham Water Department buys its water from MWRA. It lists no wells or intakes of its own.
Buys water from
- MWRA Chelsea, MA
Annual water quality report
Waltham Water Department 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