TapSafetyReport
F0/100

HANOVER WATER DEPT — Water Quality Report 2026

Serving 14,984 people · Massachusetts

Water Source
Groundwater Under Influence of Surface Water
County
—
System ID
MA4122000
Violations
41

Contaminant Test Results

4 contaminants above EPA health goals
ContaminantDetectedLimit (MCL)Status
PFOA
0.005 µg/L0.004 µg/LOver Limit
PFOS
0.004 µg/L0.004 µg/LOver Limit
chlorate
460.00 µg/L—Above Goal
Lead (90th percentile)
0.005 mg/L0.015 mg/LAbove Goal

EPA Violation History

25

Violations (last 5yr)

25

Unresolved

0

Health-Related

TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2025 – June 30, 2025Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2025 – June 30, 2025Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2025 – June 30, 2025Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2025 – June 30, 2025Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2025 – June 30, 2025Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2025 – June 30, 2025Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2025 – June 30, 2025Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2025 – June 30, 2025Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2025 – June 30, 2025Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2025 – June 30, 2025Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2025 – June 30, 2025Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2025 – June 30, 2025Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2024 – March 31, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2024 – March 31, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2024 – March 31, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2024 – March 31, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2024 – March 31, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2024 – March 31, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2024 – March 31, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2024 – March 31, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2024 – March 31, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2024 – March 31, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2024 – March 31, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2024 – March 31, 2024Enforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved

Exceeded the MCL for disinfection byproducts

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2024 – March 31, 2024Rule: Revised Total Coliform RuleEnforcement: Formal — state order issuedVerify on EPA.gov

Understanding violation severity

Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.

Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly

Frequently Asked Questions About HANOVER WATER DEPT

Is HANOVER WATER DEPT water safe to drink?

HANOVER WATER DEPT water receives a grade of F (0/100), which is considered failing. 2 contaminant(s) exceed EPA legal limits and 41 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has HANOVER WATER DEPT detected?

66 contaminants were tested in HANOVER WATER DEPT's water. Notable contaminants include PFOA, PFOS, Lead (90th percentile), chlorate. 2 exceed EPA legal limits (MCLs). 4 exceed EPA health goals (MCLGs).

Does HANOVER WATER DEPT have any EPA violations?

Yes, HANOVER WATER DEPT has 41 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, MCL, Other. 12 are health-based violations.

How many people does HANOVER WATER DEPT serve?

HANOVER WATER DEPT serves approximately 14,984 people, Massachusetts. The system provides water to 1 community: Hanover.

What type of water does HANOVER WATER DEPT provide?

HANOVER WATER DEPT sources its water from groundwater under influence of surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is MA4122000.

How does HANOVER WATER DEPT compare to other utilities in Massachusetts?

HANOVER WATER DEPT scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Massachusetts state page for a full comparison of water systems.

Cities Served

Hanover