Is Mattapoisett, Massachusetts tap water safe?
2 water systems report serving Mattapoisett. Your water depends on which one serves your address. Check your bill if unsure.
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Mattapoisett River Valley W.D.
Serves 29,600 people · Groundwater · Full report →
No health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits.
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Mattapoisett Water Department
Serves 7,685 people · Groundwater · Full report →
No health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).