F0/100
CHATHAM WATER DEPARTMENT — Water Quality Report 2026
Serving 30,000 people · Massachusetts
Water Source
Groundwater
County
—
System ID
MA4055000
Violations
67
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2019.
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 CHATHAM WATER DEPARTMENT
Is CHATHAM WATER DEPARTMENT water safe to drink?
CHATHAM WATER DEPARTMENT water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 67 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has CHATHAM WATER DEPARTMENT detected?
66 contaminants were tested in CHATHAM WATER DEPARTMENT's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CHATHAM WATER DEPARTMENT have any EPA violations?
Yes, CHATHAM WATER DEPARTMENT has 67 EPA violation(s) on record, with the most recent in 2019. Violation types include MR, MCL, Other. 19 are health-based violations.
How many people does CHATHAM WATER DEPARTMENT serve?
CHATHAM WATER DEPARTMENT serves approximately 30,000 people, Massachusetts. The system provides water to 1 community: Chatham.
What type of water does CHATHAM WATER DEPARTMENT provide?
CHATHAM WATER DEPARTMENT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MA4055000.
How does CHATHAM WATER DEPARTMENT compare to other utilities in Massachusetts?
CHATHAM WATER DEPARTMENT 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.