Public water system record
Sudbury Water District
Serves an area of Middlesex County, MA · 18,416 people served
Federal records show 1 health-based violation and 3 monitoring/reporting issues for Sudbury Water District in the last ten years, including an unresolved Revised Total Coliform Rule violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 0
- Unresolved
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 3
Key facts
- Sudbury Water District draws water from 9 wells.
- Most recent formal enforcement: compliance order (no penalty) by Massachusetts, January 2026.
- Record on file since 1994, with 9 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 179 unknown out of 5,888 service lines.
Check whether Sudbury Water District 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.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Revised Total Coliform Rule
Treatment technique failure
|
110 | Aug 1, 2025 |
Active
Enforcement action in place
|
No |
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
|
Jun 1, 2022 |
Active
Enforcement action in place
|
|
ENTEROCOCCI
Monitoring and reporting
|
Jun 1, 2019 | Active |
|
Lead and Copper Rule
Monitoring and reporting
|
Jun 1, 2018 |
Active
Enforcement action in place
|
Full record since 1994
EPA's records for Sudbury Water District go back to 1994. Before October 19, 2016 they list 9 health-based violations (9 archived by EPA without a recorded fix) and 183 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 9 | 121 |
| 2000s | 0 | 38 |
| 2010 to October 18, 2016 | 0 | 24 |
| October 19, 2016 to 2019 | 0 | 2 |
| 2020s | 1 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform (acute), began June 1997, Archived.
Show all 9 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform (acute)
Contaminant limit exceeded
|
Jun 1, 1997 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 1997 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Jan 1, 1997 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 1996 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 1996 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1996 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1996 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1995 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1995 | Archived |
Enforcement actions
Massachusetts regulators took 15 formal enforcement actions against Sudbury Water District between 1997 and 2026. The most recent was a compliance order (no penalty) in January 2026.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jan 22, 2026 | Massachusetts | Compliance order (no penalty) | 1 violation (1 health-based): Revised Total Coliform Rule |
| Feb 7, 2023 | Massachusetts | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
| Feb 25, 2019 | Massachusetts | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
| Nov 25, 2014 | Massachusetts | Compliance order (no penalty) | 1 violation: Total Coliform |
| Nov 8, 2010 | Massachusetts | Compliance order (no penalty) | 22 violations: 1,2-Dichloroethane, Trichloroethylene, Vinyl chloride, CHLOROBENZENE, cis-1,2-Dichloroethylene |
| Sep 29, 2009 | Massachusetts | Compliance order (no penalty) | 1 violation: Total Coliform |
| Apr 16, 2009 | Massachusetts | Compliance order (no penalty) | 1 violation: Total Coliform |
| Sep 15, 2008 | Massachusetts | Compliance order (no penalty) | 1 violation: Total Coliform |
| Jan 27, 2006 | Massachusetts | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
| Mar 18, 2002 | Massachusetts | Compliance order (no penalty) | 33 violations: Glyphosate, Di(2-ethylhexyl) adipate, OXAMYL, Simazine, Picloram |
| Oct 2, 2000 | Massachusetts | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
| Dec 21, 1999 | Massachusetts | Compliance order (no penalty) | 54 violations: Styrene, BHC-GAMMA, Methoxychlor, Toxaphene, Endothall |
| May 18, 1998 | Massachusetts | Compliance order (no penalty) | 33 violations: 2,4-D, 2,4,5-TP, Pentachlorophenol, Endothall, Glyphosate |
| Jan 27, 1998 | Massachusetts | Compliance order (no penalty) | 33 violations: Endrin, BHC-GAMMA, Methoxychlor, Toxaphene, Diquat |
| Jul 1, 1997 | Massachusetts | Compliance order (no penalty) | 7 violations (7 health-based): Total Coliform |
What the violations mean
Revised Total Coliform Rule
1 incidentThe system did not meet a requirement of the Revised Total Coliform Rule
Coliform and E. coli rules protect against bacteria in the distribution system
Where the water comes from
Sudbury Water District draws water from 9 wells.
Annual water quality report
Sudbury Water District 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