Lead in Massachusetts Drinking Water — 505 ZIPs Tested

Lead Contamination in Massachusetts

ZipCheckup analyzed drinking water data across 695 ZIP codes in Massachusetts for lead contamination. 505 ZIP codes have reported lead detections, and 24 have EPA violations on record.

The violation rate for lead in Massachusetts is 3.5% of all ZIP codes — roughly in line with the national average.

EPA Standard for Lead

The EPA maximum contaminant level (MCL) for lead is 15 ppb (action level), governed by the Lead and Copper Rule (LCRR/LCRI). Water systems that exceed this limit must take corrective action and notify consumers.

Worst ZIP Codes for Lead in Massachusetts

These ZIP codes reported the highest lead levels in Massachusetts based on CCR reports and EPA data:

Lowest Lead Levels in Massachusetts

These ZIP codes had the lowest reported lead detections in Massachusetts:

Health Effects of Lead

Lead is a potent neurotoxin with no safe level of exposure. In children, lead causes developmental delays, reduced IQ, and behavioral problems. In adults, it causes high blood pressure, kidney damage, and cardiovascular effects. Pregnant women face increased risk of premature birth.

How to Remove Lead From Drinking Water

The most effective treatment for lead removal is Reverse Osmosis or NSF 53 Carbon Block. Look for filters certified under NSF 53 / NSF 58 standards.

Check Your ZIP Code

Use the ZipCheckup water quality search to see lead data for your specific water system in Massachusetts.