Massachusetts County Water Quality Reports
Water quality reports for all counties in Massachusetts. Browse by county to see safety scores, violations, and ZIP code data.
Browse water quality data by county in Massachusetts. Each county page lists all ZIP codes with safety scores and EPA violation data.
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Barnstable County, MA: 4 Health Violations — 64/100 (2026)
2026 report: Barnstable County, MA scores 64/100 (Grade C). 54 ZIP codes analyzed. 32 EPA violations found. Free report with contaminant data and filter...
Berkshire County, MA: 4 Health Violations — 70/100 (2026)
2026 report: Berkshire County, MA scores 70/100 (Grade B). 39 ZIP codes analyzed. 14 EPA violations found. Free report with contaminant data and filter ...
Bristol County, MA: 28 Health Violations — 67/100 (2026)
2026 report: Bristol County, MA scores 67/100 (Grade C). 40 ZIP codes analyzed. 78 EPA violations found. Free report with contaminant data and filter pi...
Dukes County, MA: 4 Violations — 68/100 (2026)
2026 report: Dukes County, MA scores 68/100 (Grade C). 7 ZIP codes analyzed. 4 EPA violations found. Free report with contaminant data and filter picks.
Essex County, MA: PFAS Found in Water — 59/100 (2026)
2026 report: Essex County, MA scores 59/100 (Grade C). 59 ZIP codes analyzed. 89 EPA violations found. PFAS detected. Free report with contaminant data ...
Franklin County, MA: 8 Violations — 70/100 (2026)
2026 report: Franklin County, MA scores 70/100 (Grade B). 30 ZIP codes analyzed. 8 EPA violations found. Free report with contaminant data and filter pi...
Hampden County, MA: 29 Health Violations — 79/100 (2026)
2026 report: Hampden County, MA scores 79/100 (Grade B). 54 ZIP codes analyzed. 71 EPA violations found. Free report with contaminant data and filter pi...
Hampshire County, MA: Lead Above EPA Limits — 73/100 (2026)
2026 report: Hampshire County, MA scores 73/100 (Grade B). 29 ZIP codes analyzed. 4 EPA violations found. Lead above EPA limits. Free report with contam...
Middlesex County, MA: Lead Above EPA Limits — 58/100 (2026)
2026 report: Middlesex County, MA scores 58/100 (Grade C). 105 ZIP codes analyzed. 124 EPA violations found. Lead above EPA limits. Free report with con...
Nantucket County, MA: 12 Violations — 67/100 (2026)
2026 report: Nantucket County, MA scores 67/100 (Grade C). 4 ZIP codes analyzed. 12 EPA violations found. Free report with contaminant data and filter p...
Norfolk County, MA: 19 Health Violations — 66/100 (2026)
2026 report: Norfolk County, MA scores 66/100 (Grade C). 55 ZIP codes analyzed. 65 EPA violations found. Free report with contaminant data and filter pi...
Plymouth County, MA: 13 Health Violations — 65/100 (2026)
2026 report: Plymouth County, MA scores 65/100 (Grade C). 64 ZIP codes analyzed. 110 EPA violations found. Free report with contaminant data and filter ...
Suffolk County, MA: 115 Violations — 85/100 (2026)
2026 report: Suffolk County, MA scores 85/100 (Grade A). 50 ZIP codes analyzed. 115 EPA violations found. Free report with contaminant data and filter p...
Worcester County, MA: Lead Above EPA Limits — 61/100 (2026)
2026 report: Worcester County, MA scores 61/100 (Grade C). 105 ZIP codes analyzed. 167 EPA violations found. Lead above EPA limits. Free report with con...
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