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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
101–121 of 121Winterport Water District
ME0091640 · 763 served
Friendly Village of Gorham Mhp
ME0007086 · 763 served
Cornish Water District
ME0090380 · 758 served
North Haven Water Department
ME0091130 · 740 served
Bowdoinham Water District
ME0090210 · 738 served
Knights Hill Association
ME0090800 · 718 served
Ashland Water & Sewer District
ME0090060 · 713 served
Winter Harbor Water District
ME0091630 · 700 served
Washburn Water & Sewer District
ME0091570 · 688 served
Stonington Water Company
ME0091510 · 683 served
Brownville Jct Water Dept
ME0090240 · 663 served
Mt Blue Standard Water District
ME0091260 · 650 served
Limerick Water District
ME0090850 · 625 served
Monmouth Water Association
ME0091020 · 588 served
Eagle Lake Water & Sewer District
ME0090480 · 585 served
Pine Tree Mobile Estates
ME0003240 · 560 served
Northport Village Corp Water Dept
ME0091165 · 550 served
West Paris Water District
ME0091600 · 540 served
Indian Township Tribal Water System
ME0090719 · 535 served
North Jay Water District
ME0091160 · 500 served
Strong Water District
ME0091530 · 500 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