Is Chelmsford, Massachusetts tap water safe?
3 water systems report serving Chelmsford. Your water depends on which one serves your address. Check your bill if unsure.
D
Chelmsford Water District
Serves 28,750 people · Groundwater · Full report →
1 health-based violation in the last 5 years; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Lead 90th percentile below the action level (2025).
A
North Chelmsford Water Dist
Serves 7,660 people · Groundwater · Full report →
No health-based violations in the last 5 years; 2 monitoring/reporting violations; 2 not yet resolved; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
A
East Chelmsford Water District
Serves 2,800 people · Surface water · Full report →
No health-based violations in the last 5 years; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2024).