Chelmsford
Is Chelmsford tap water safe to drink?
Mostly yes — Chelmsford scores 89/100. This report aggregates EPA drinking water data across 2 local systems in Chelmsford. We found 192 total violations (92 unresolved).
Real-Time Environment
Live: 05:45 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Chelmsford.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Chelmsford?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Filtration technologies matched to Chelmsford contaminant records.
Baby Formula Safety
Guidance on preparing infant formula using municipal tap water in Chelmsford.
Homebuyer's Perspective
Municipal water quality in Chelmsford directly influences pipe corrosion rates and home filtration needs. The high safety score (89/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Residents should monitor Lead (90th percentile) levels. Pregnant women and families with young children should consult the specific EPA health goals listed below.
View Health Risk Glossary →Compliance Record for Chelmsford
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Chelmsford.
Frequently Asked Questions
Is Chelmsford tap water safe to drink?
Mostly yes — Chelmsford scores 89/100.
How many water systems serve Chelmsford?
Chelmsford is served by 2 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Chelmsford?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Chelmsford.
What is the water quality score for Chelmsford?
The water quality score for Chelmsford is 89 out of 100, based on EPA contaminant data, violation history, and testing results across the 2 systems serving the city.
What are the top contaminants in Chelmsford?
The top contaminants detected in Chelmsford include Lead (90th percentile). View detailed information on our contaminants page.
Chelmsford Water Quality Summary
Chelmsford, MA receives a water quality score of 89/100 (Grade B) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 2 public water systems serving the area.
Chelmsford's water quality is above the national average, with strong compliance records and low contaminant levels. Residents generally receive clean, safe tap water that meets EPA standards.
Chelmsford's score of 89 is 15 points above the Massachusetts state average of 74, and above the nationwide average of roughly 78/100 across all U.S. states.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Massachusetts water quality rankings report →
Key Contaminants
Join the Chelmsford updates waitlist
We are developing email updates. This form records your interest; automated violation and boil-water advisory emails are not active.
We will use your address to contact you if updates become available. See our Privacy Policy.
Water Systems Serving Chelmsford (2)
Check Your Specific Address
Water quality can vary by neighborhood in Chelmsford.
Related
Quick compare in Massachusetts
Compare Chelmsford water quality: View all states · Contaminant library · How we score water quality