B69/100
CHELMSFORD WATER DISTRICT — Water Quality Report 2026
Serving 28,750 people · Massachusetts
Water Source
Groundwater
County
—
System ID
MA3056000
Violations
5
Contaminant Test Results
4 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOA | 0.007 µg/L | 0.004 µg/L | Over Limit |
PFOS | 0.006 µg/L | 0.004 µg/L | Over Limit |
chlorate | 320.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2014.
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 CHELMSFORD WATER DISTRICT
Is CHELMSFORD WATER DISTRICT water safe to drink?
CHELMSFORD WATER DISTRICT water receives a grade of B (69/100), which is considered good. Out of 73 contaminants tested, 2 exceed EPA legal limits. 4 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CHELMSFORD WATER DISTRICT detected?
73 contaminants were tested in CHELMSFORD WATER DISTRICT's water. Notable contaminants include PFOA, PFOS, Lead (90th percentile), chlorate. 2 exceed EPA legal limits (MCLs). 4 exceed EPA health goals (MCLGs).
Does CHELMSFORD WATER DISTRICT have any EPA violations?
Yes, CHELMSFORD WATER DISTRICT has 5 EPA violation(s) on record, with the most recent in 2014. Violation types include Other, MR, MCL. 1 are health-based violations.
How many people does CHELMSFORD WATER DISTRICT serve?
CHELMSFORD WATER DISTRICT serves approximately 28,750 people, Massachusetts. The system provides water to 1 community: Chelmsford.
What type of water does CHELMSFORD WATER DISTRICT provide?
CHELMSFORD WATER DISTRICT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MA3056000.
How does CHELMSFORD WATER DISTRICT compare to other utilities in Massachusetts?
CHELMSFORD WATER DISTRICT scores 69/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Massachusetts state page for a full comparison of water systems.