Water Service Outages in Maine by City

Maine drinking water record

• Community water systems: 386 active systems serve about 691,453 people. 350 of them (91%) serve 3,300 people or fewer; 334 draw mainly on groundwater and 48 on surface water.
• Health-based violations since 2015: 368, at 97 systems (25% of all systems). That share is 20th of 50 states (1 = lowest).
• Most common problems: contaminant averages over the limit (248); lead and copper corrosion-control studies (37); coliform treatment technique (13). Source: EPA SDWIS
• Largest system: Portland Water District-Greater, about 135,068 people, with 0 health-based violations since 2015. Source: EPA SDWIS
• Housing age: the median Maine home was built in 1977 (US 1980). Source: US Census Bureau, ACS 2020–2024 (table B25035)
• Storm damage to water service: NOAA storm narratives mention water mains, boil water notices or lost water service in 2 episodes in Maine since 2015. Source: NOAA Storm Events Database
• January 13, 2024, Coastal Cumberland (coastal flood): “Also, flood waters infiltrated the wastewater plant on Black Point Road in an area where trail systems and beach access were also damaged.” Source: NOAA Storm Events Database
• May 1, 2023, Androscoggin (flood): “This resulted in flooding of the water treatment plant and significant damages.” Source: NOAA Storm Events Database

Checked September 2026.