State Hub
Maine Water Quality
121
Utilities in database
0.7M
Residents served
48%
On private wells
2
Key contaminants tracked
Drinking Water in Maine
Maine has 121 community water systems serving approximately 0.7 million residents. Primary water sources include groundwater. The most commonly reported contaminants include lead, nitrates. 48% of Maine residents rely on private wells. DHHS holds primary enforcement authority under the Safe Drinking Water Act.
Utilities in Maine
1–25 of 121Portland Water District-greater
ME0091300 · 135,068 served
Maine Water Company Biddeford Saco Div
ME0090170 · 42,508 served
Kennebunk, Kennebunkport & Wells Wd
ME0090760 · 35,663 served
Bangor Water District
ME0090110 · 27,298 served
Lewiston Water & Sewer Division
ME0090830 · 23,720 served
Kennebec Water District
ME0090750 · 22,060 served
Maine Water Company Camden & Rockland
ME0090300 · 21,315 served
Brunswick/topsham Water District
ME0090260 · 18,863 served
Auburn Water District
ME0090070 · 17,245 served
Kittery Water District
ME0090790 · 14,478 served
Sanford Water District
ME0091410 · 14,328 served
Greater Augusta Utility District
ME0090080 · 13,750 served
York Water District
ME0091680 · 13,675 served
Bath Water District
ME0090130 · 9,290 served
Gardiner Water District
ME0090610 · 9,000 served
Brewer Water Department
ME0090220 · 8,860 served
Boothbay Region Water District
ME0090200 · 8,448 served
Yarmouth Water District
ME0091670 · 8,000 served
Old Town Water District
ME0091200 · 7,648 served
Lisbon Water Department
ME0090870 · 6,643 served
Presque Isle Utilities District
ME0091310 · 6,128 served
Maine Water Company Skowhegan Division
ME0091450 · 6,105 served
Orono-veazie Water District
ME0091210 · 5,793 served
Belfast Water District
ME0090140 · 5,698 served
Anson and Madison Water District
ME0090930 · 5,568 served
Key Contaminant Concerns in Maine
Lead
Lead is a naturally occurring heavy metal that was widely used in plumbing infrastructure until it was banned for new installations in 1986. An estimated 9.2 million lead service lines still connect homes to public water mains across the United States, along with millions of homes with lead solder in their internal plumbing.
Nitrates
Nitrate (NO₃⁻) is a nitrogen-containing compound that forms naturally through the decomposition of organic matter. At elevated concentrations — almost always from human activity — nitrate interferes with the blood's ability to carry oxygen. The United States produces over 23 million tons of nitrogen fertilizer annually, making agricultural runoff the dominant source of nitrate contamination.
Maine Water FAQs
Quick Links
Data source: Utility data from EPA SDWIS. 121 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-23