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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
51–75 of 121Mexico Water District
ME0090970 · 2,425 served
Dover-foxcroft Water District
ME0090470 · 2,400 served
Dexter Utility District
ME0090440 · 2,338 served
Hallowell Water District
ME0090650 · 2,300 served
Van Buren Water District
ME0091540 · 2,190 served
Great Salt Bay Sanitary District
ME0090410 · 2,143 served
East Millinocket Water Works
ME0091150 · 2,133 served
North Berwick Water District
ME0091120 · 2,125 served
Passamaquoddy Water District
ME0090510 · 2,125 served
Fryeburg Water Company
ME0090600 · 2,085 served
Fort Fairfield Utilities District
ME0090550 · 2,025 served
Mechanic Falls Water Dept
ME0090960 · 2,010 served
Norway Water District
ME0091180 · 2,000 served
Wiscasset Water District
ME0091660 · 1,970 served
Newport Water District
ME0091100 · 1,900 served
Bethel Water District
ME0090160 · 1,813 served
Lubec Water District
ME0090900 · 1,775 served
Sugarloaf Water Association
ME0091690 · 1,730 served
Milo Water District
ME0091000 · 1,720 served
Maine Water Company Bucksport Division
ME0090280 · 1,700 served
Baileyville Utilities District
ME0090100 · 1,688 served
Mount Desert Water Dist North
ME0091140 · 1,623 served
Fort Kent W & W Department
ME0090560 · 1,578 served
Sabattus Sanitary District
ME0091580 · 1,550 served
Guilford-sangerville Utilities District
ME0090640 · 1,535 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