State Hub
Maine Water Quality
121
Utilities in database
0.7M
Residents served
0
With open violations
37
PFAS monitored
Quick Answer
Maine public drinking water is served by 121 EPA-tracked water systems, providing service to approximately 0.7 million residents through public utilities. No open health-based violations are currently recorded across tracked systems in the EPA federal database. 37 systems have official PFAS monitoring records from the EPA UCMR 5 program (2023–2025). About 48% of ME residents use private wells, which fall outside federal utility compliance monitoring.
No open health-based violations are currently recorded in the EPA SDWIS database for Maine's tracked water systems. Always verify with your utility's Consumer Confidence Report for annual test results.
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.
Safest Large Utilities
Maine systems with no open health violations serving 10,000+ residents.
Portland Water District-greater
Cape Elizabeth,Cumberland,Falmouth,Gorham,Portland,Raymond,Scarborough,South Portland,Standish,Westbrook,Windham · 135,068
Maine Water Company Biddeford Saco Div
Biddeford,Saco · 42,508
Kennebunk, Kennebunkport & Wells Wd
Kennebunk,Kennebunkport,Wells · 35,663
Bangor Water District
Bangor,Clifton,Eddington,Hampden,Hermon,Orrington,Veazie · 27,298
Lewiston Water & Sewer Division
Lewiston · 23,720
Utilities in Maine
26–50 of 121Maine Water Company Millinocket Division
ME0090990 · 5,400 served
Houlton Water Company
ME0090700 · 4,735 served
Hampden Water District
ME0090660 · 4,628 served
Town of Bar Harbor- Water Division
ME0090120 · 4,443 served
Rumford Water District
ME0091380 · 4,050 served
Farmington Village Corp Water Dept
ME0090540 · 4,050 served
Caribou Utilities District
ME0090320 · 3,943 served
Ellsworth Water Department
ME0090520 · 3,910 served
South Berwick Water District
ME0091470 · 3,722 served
Bridgton Water District
ME0090230 · 3,660 served
Lake Arrowhead Community Inc
ME0090811 · 3,500 served
Pittsfield Water Dept
ME0091280 · 3,228 served
Lincoln Water District
ME0090860 · 3,020 served
Livermore Falls Water District
ME0090880 · 2,995 served
Paris Utility District
ME0091230 · 2,940 served
Maine Water Company Oakland Division
ME0091190 · 2,873 served
Berwick Water Department
ME0090150 · 2,845 served
Wilton Water Department
ME0091620 · 2,800 served
Calais Water Dept
ME0090290 · 2,775 served
Searsport Water District
ME0091440 · 2,763 served
Winthrop Utilities District
ME0091650 · 2,750 served
Madawaska Water District
ME0090920 · 2,738 served
Maine Water Company Freeport Division
ME0090580 · 2,700 served
Southwest Harbor Water & Sewer District
ME0091490 · 2,480 served
Gray Water District
ME0090620 · 2,468 served
Key Contaminant Concerns in Maine
These contaminants appear most frequently in Maine utility records or pose elevated risk in this region based on EPA data.
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. Critically, a utility's water quality report can show zero detected lead at the treatment plant while your specific tap still delivers elevated lead — because the contamination happens inside the distribution system and your home's plumbing, not at the source.
EPA limit: 15 ppb (action level)
Nitrates
Nitrate (NO₃⁻) is a nitrogen-containing compound that forms naturally through the decomposition of organic matter. At elevated concentrations — almost always caused by human activity — nitrate is converted in the digestive system to nitrite, which then reacts with hemoglobin to form methemoglobin, a form of hemoglobin that cannot carry oxygen. In the body, nitrite also reacts with amines in food to form N-nitroso compounds (nitrosamines) — known carcinogens classified by the IARC as Group 2A (probable human carcinogens). The United States applies over 23 million tons of nitrogen fertilizer annually, making agricultural runoff the dominant source of nitrate contamination in U.S. groundwater.
EPA limit: 10 mg/L
City Water Reports in Maine
Tap water quality pages for Maine cities — violations, PFAS records, utility profiles, and official source links.
Independent Water Testing
Find a certified lab in Maine
Utility compliance records show what water systems report to the EPA. An independent test from a certified laboratory confirms what's actually in your tap water. Maine labs can test for PFAS, lead, nitrates, bacteria, and dozens of other contaminants.
Explore Water Quality in Maine
Maine Water Company Millinocket Division
Violation history, PFAS records, and official source links
Houlton Water Company
Violation history, PFAS records, and official source links
Hampden Water District
Violation history, PFAS records, and official source links
PFAS monitoring records — Maine
37 water systems in Maine with EPA UCMR 5 records
Lead in Maine drinking water
State-specific lead data, violation utilities, and testing guidance
PFAS in Maine drinking water
State-specific PFAS data, MCL context, and treatment options
Certified water testing labs in Maine
Labs certified for PFAS (EPA 533/537.1), lead, and bacteria testing
Water treatment options
Reverse osmosis, activated carbon, and filtration guides with cost ranges
Data sources and methodology
How WaterUtilityReport.com sources and validates official EPA data
Common Questions About Maine Drinking Water
Does Maine drinking water have PFAS?
37 Maine water systems have EPA UCMR 5 PFAS monitoring records (2023–2025)
Which Maine water utilities have open violations?
Browse Maine utility compliance records and violation history
How do I test my water in Maine?
State-certified labs for PFAS (EPA 533/537.1), lead, nitrate, and bacteria testing
What treatment removes PFAS from ME tap water?
Reverse osmosis removes PFAS, lead, arsenic, and nitrates — cost, maintenance, and NSF certification explained
What do Maine PFAS records tell me about my water?
EPA limits, health context, and what UCMR 5 detection above MRL means for your water
How is Maine water quality data sourced here?
EPA SDWIS violations, UCMR 5 PFAS records, and CCR data — sources, accuracy notes, and limitations
Maine Water FAQs
Data sources: Utility compliance and violation data from EPA SDWIS (Safe Drinking Water Information System). PFAS monitoring records from EPA UCMR 5 (Unregulated Contaminant Monitoring Rule 5, 2023–2025). Contaminant data from EPA and ATSDR public references. This page summarizes public records — it is not a compliance determination. Methodology →
Last updated: 2026-04-23