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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
76–100 of 121Mars Hill and Blaine Water Company
ME0090940 · 1,500 served
Dixfield Water & Sewer Dept
ME0090460 · 1,415 served
Richmond Utilities District
ME0091370 · 1,390 served
Machias Water Company
ME0090910 · 1,390 served
Rangeley Water District
ME0091330 · 1,378 served
Maine Water Company Greenville Division
ME0090630 · 1,335 served
Jackman Utility District
ME0090730 · 1,125 served
Maine Water Company Kezar Falls Division
ME0090770 · 1,115 served
Oxford Water District
ME0091220 · 1,100 served
Bingham Water District
ME0090180 · 1,075 served
Waldoboro Water Dept
ME0091560 · 1,065 served
Norridgewock Water District
ME0091110 · 1,055 served
Vinalhaven Water District
ME0091550 · 1,053 served
Maine Water Company Hartland Division
ME0090680 · 1,043 served
Howland Water Department
ME0090710 · 1,025 served
Clinton Water District
ME0090350 · 1,013 served
Castine Water Department
ME0090330 · 983 served
Jay Village Water District
ME0090740 · 975 served
South Freeport Water District
ME0091480 · 960 served
Kingfield Water District
ME0090780 · 950 served
Limestone Water & Sewer District
ME0090840 · 875 served
Mount Desert Water Dist -seal
ME0091420 · 865 served
Harrison Water District
ME0090670 · 863 served
Maine Water Company Warren Division
ME0091565 · 815 served
Alfred Water District
ME0090020 · 783 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
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Data source: Utility data from EPA SDWIS. 121 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-23