Is Tap Water Safe to Drink in Boston?
Yes, tap water in Boston is safe to drink and consistently ranks among the highest quality municipal water in the U.S., sourced from protected reservoirs and requiring minimal treatment.
Water Source
The MWRA (Massachusetts Water Resources Authority) supplies Boston from the Quabbin and Wachusett Reservoirs, both fed by protected forested watersheds, allowing the system to operate without full filtration under an EPA filtration avoidance determination — a status shared by only a handful of U.S. cities.
EPA Compliance Status
Meets all federal Safe Drinking Water Act standards; operates under an EPA filtration avoidance determination due to exceptional source water quality.
Notable Contaminants & Context
- •No significant source-water concerns given the protected reservoir system
- •Some older Boston-area homes have legacy lead service lines; corrosion-control treatment (pH/alkalinity adjustment) keeps lead levels low, and a replacement program is ongoing
How It Compares
Boston's reservoir system is naturally so clean it doesn't require full filtration, similar to New York City, Seattle, and Portland (Oregon) — a distinction only a small number of large U.S. systems hold.
Tips
- •Boston's water is genuinely excellent straight from the tap
- •Running the tap briefly in pre-1950s buildings clears any standing water from legacy lines
- •MWRA publishes detailed annual water quality reports
Frequently Asked Questions
Sources & References
The safety rating and guidance on this page draw on the following sources. See our full methodology.
- •US EPA Safe Drinking Water Act regulations
- •EWG Tap Water Database
- •The utility's most recent Consumer Confidence Report (CCR)
- •WHO Guidelines for Drinking-water Quality