Public water system record
Hanover Water Dept
Serves an area of Plymouth County, MA · 14,984 people served
Federal records show 7 health-based violations and 25 monitoring/reporting issues for Hanover Water Dept in the last ten years. The most serious issue in this window was a Total Trihalomethanes (TTHMs) violation that EPA lists as archived, not resolved.
System profile
Source water
Groundwater under direct influence
ZIP
02339
EPA system ID
MA4122000
- Health-based violations, last 10 years
- 7
- Resolved
- 0
- Unresolved
- 0
- Archived by EPA
- 7
- Any acute record
- No
- Monitoring issues, last 10 years
- 25
Key facts
- Hanover Water Dept draws water from 10 wells (2 of them for emergency, seasonal or other part-time use).
- Most recent formal enforcement: compliance order (no penalty) by Massachusetts, August 2025.
- Record on file since 2000, with 5 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 5,219 service lines.
Check whether Hanover Water Dept 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 |
|---|---|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
220 | Jan 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
220 | Oct 1, 2019 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
220 | Jul 1, 2019 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
220 | Apr 1, 2019 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
220 | Jan 1, 2019 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
220 | Oct 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
220 | Jul 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
CYANIDE
Monitoring and reporting
|
Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Thallium, Total
Monitoring and reporting
|
Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Nickel
Monitoring and reporting
|
Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Beryllium, Total
Monitoring and reporting
|
Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Antimony, Total
Monitoring and reporting
|
Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Chromium (total)
Monitoring and reporting
|
Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Cadmium
Monitoring and reporting
|
Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Barium
Monitoring and reporting
|
Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Selenium
Monitoring and reporting
|
Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Mercury
Monitoring and reporting
|
Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Arsenic
Monitoring and reporting
|
Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Fluoride
Monitoring and reporting
|
Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Tetrachloroethylene
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Thallium, Total
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Nickel
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Beryllium, Total
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Antimony, Total
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Chromium (total)
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Cadmium
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Barium
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Selenium
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Mercury
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Arsenic
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Fluoride
Monitoring and reporting
|
Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Full record since 2000
EPA's records for Hanover Water Dept go back to 2000. Before October 19, 2016 they list 5 health-based violations (3 resolved, 2 archived by EPA without a recorded fix) and 4 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 0 | 1 |
| 2010 to October 18, 2016 | 5 | 3 |
| October 19, 2016 to 2019 | 6 | 0 |
| 2020s | 1 | 25 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began July 2015, Archived.
Show all 5 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Jul 1, 2015 | Archived |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Apr 1, 2015 | Archived |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Sep 1, 2011 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2011 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 2010 | Resolved |
Enforcement actions
Massachusetts regulators took 8 formal enforcement actions against Hanover Water Dept between 2001 and 2025. The most recent was a compliance order (no penalty) in August 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Aug 4, 2025 | Massachusetts | Compliance order (no penalty) | 12 violations: Fluoride, Arsenic, Beryllium, Total, Thallium, Total, CYANIDE |
| May 3, 2024 | Massachusetts | Compliance order (no penalty) | 13 violations: Fluoride, Mercury, Selenium, Barium, Chromium (total) |
| Jul 2, 2015 | Massachusetts | Compliance order (no penalty) | 9 violations (9 health-based): Total Trihalomethanes (TTHMs) |
| Feb 19, 2015 | Massachusetts | Compliance order (no penalty) | 1 violation: Tetrachloroethylene |
| Nov 29, 2011 | Massachusetts | Compliance order (no penalty) | 2 violations (2 health-based): Total Coliform |
| Feb 18, 2011 | Massachusetts | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Jul 21, 2010 | Massachusetts | Compliance order (no penalty) | 1 violation: Consumer Confidence Rule |
| May 25, 2001 | Massachusetts | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
What the violations mean
Total Trihalomethanes (TTHMs)
7 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Where the water comes from
Hanover Water Dept draws water from 10 wells (2 of them for emergency, seasonal or other part-time use).
Annual water quality report
Hanover Water Dept 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