Is Johnston, Rhode Island tap water safe?
1 water system report serving Johnston. Your water depends on which one serves your address. Check your bill if unsure.
A
Providence Water
Serves 333,142 people · Surface water · Full report →
No health-based violations in the last 5 years; 2 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2026).