All 38 systems met the sampling requirement for a yearly average. Of those systems, 2 had at least one yearly average above an EPA comparison level and 36 did not.
EPA-based study benchmark: a fixed, unrounded research cutoff used to reproduce EPA’s final UCMR 5 technical-assistance classification based on the April 2024 federal levels. It is not a current federal or state standard. The label does not determine compliance, household exposure, or health risk.
State rules: The labels on this page use fixed research cutoffs based on the April 2024 federal levels. Maine may use different current standards or guidance. These UCMR 5 results do not determine current federal or state compliance. Find the official Maine drinking-water program →
Find your water system
A ZIP code finds possible public water systems for an area; it cannot identify the supplier for a specific home. Confirm the provider using a water bill or utility record.
System counts in Maine
Each count shows how many included water systems had a yearly average above the named EPA comparison level.
| EPA rounding cutoff | Systems above comparison level | Water systems included | Percent |
|---|---|---|---|
| PFOA: 4 ppt level; unrounded average ≥4.05 ppt after applying EPA rounding | 2 | 38 | 5.3% |
| PFOS: 4 ppt level; unrounded average ≥4.05 ppt after applying EPA rounding | 1 | 38 | 2.6% |
| PFHxS: 10 ppt level; unrounded average ≥15 ppt after applying EPA rounding | 0 | 38 | 0.0% |
| PFNA: 10 ppt level; unrounded average ≥15 ppt after applying EPA rounding | 0 | 38 | 0.0% |
| HFPO-DA: 10 ppt level; unrounded average ≥15 ppt after applying EPA rounding | 0 | 38 | 0.0% |
| Hazard Index: 1 level; unrounded index ≥1.5 and at least two detected components | 0 | 38 | 0.0% |
Community water systems with complete monitoring
“Complete monitoring” means at least one sampling location had every required sample needed to calculate a yearly average. It does not mean every location or home was tested. Each PWSID appears once, preventing double counting across ZIP associations.
| Public water system | PWSID | Population served | Primary source | Sampling locations | EPA comparison result |
|---|---|---|---|---|---|
| ANSON AND MADISON WATER DISTRICT | ME0090930 | 5,568 | Surface water | 2 | No available average above comparison levels |
| AUBURN WATER DISTRICT, ME | ME0090070 | 17,245 | Surface water | 1 | No available average above comparison levels |
| BANGOR WATER DISTRICT | ME0090110 | 27,298 | Surface water | 1 | No available average above comparison levels |
| BATH WATER DISTRICT | ME0090130 | 9,205 | Surface water | 1 | No available average above comparison levels |
| BELFAST WATER DISTRICT | ME0090140 | 5,698 | Ground water | 2 | No available average above comparison levels |
| BOOTHBAY REGION WATER DISTRICT | ME0090200 | 8,448 | Surface water | 1 | No available average above comparison levels |
| BREWER WATER DEPARTMENT | ME0090220 | 8,860 | Surface water | 1 | No available average above comparison levels |
| BRUNSWICK / TOPSHAM WATER DISTRICT | ME0090260 | 18,863 | Ground water | 3 | No available average above comparison levels |
| CARIBOU UTILITIES DISTRICT | ME0090320 | 3,943 | Ground water | 1 | No available average above comparison levels |
| ELLSWORTH WATER DEPARTMENT | ME0090520 | 3,910 | Surface water | 1 | No available average above comparison levels |
| FARMINGTON VILLAGE CORP WATER DEPT | ME0090540 | 4,050 | Ground water | 2 | No available average above comparison levels |
| FRANKLIN WATER DEPARTMENT, ME | ME0090570 | 443 | Ground water | 1 | No available average above comparison levels |
| GARDINER WATER DISTRICT | ME0090610 | 9,000 | Ground water | 1 | No available average above comparison levels |
| GREATER AUGUSTA UTILITY DISTRICT | ME0090080 | 13,750 | Ground water | 1 | No available average above comparison levels |
| HAMPDEN WATER DISTRICT | ME0090660 | 4,628 | Surface water purchased | 3 | No available average above comparison levels |
| HOULTON WATER COMPANY | ME0090700 | 4,735 | Ground water | 2 | No available average above comparison levels |
| KENNEBEC WATER DISTRICT | ME0090750 | 22,060 | Surface water | 1 | No available average above comparison levels |
| KENNEBUNK, KENNEBUNKPORT & WELLS WD | ME0090760 | 35,663 | Surface water | 5 | No available average above comparison levels |
| KITTERY WATER DISTRICT | ME0090790 | 14,478 | Surface water | 1 | No available average above comparison levels |
| LAKE ARROWHEAD COMMUNITY INC | ME0090811 | 3,500 | Ground water | 2 | No available average above comparison levels |
| LEWISTON WATER & SEWER DIVISION | ME0090830 | 23,720 | Surface water | 1 | No available average above comparison levels |
| LISBON WATER DEPARTMENT | ME0090870 | 6,643 | Ground water | 4 | No available average above comparison levels |
| MAINE WATER COMPANY BIDDEFORD SACO DIV | ME0090170 | 42,508 | Surface water | 1 | No available average above comparison levels |
| MAINE WATER COMPANY CAMDEN & ROCKLAND | ME0090300 | 21,315 | Surface water | 1 | No available average above comparison levels |
| MAINE WATER COMPANY MILLINOCKET DIVISION | ME0090990 | 5,400 | Surface water | 1 | No available average above comparison levels |
| MAINE WATER COMPANY SKOWHEGAN DIVISION | ME0091450 | 6,105 | Surface water | 1 | No available average above comparison levels |
| OLD TOWN WATER DISTRICT | ME0091200 | 7,648 | Ground water | 1 | No available average above comparison levels |
| ORONO-VEAZIE WATER DISTRICT | ME0091210 | 5,793 | Ground water | 1 | No available average above comparison levels |
| PORTLAND WATER DISTRICT-GREATER | ME0091300 | 135,068 | Surface water | 1 | No available average above comparison levels |
| PRESQUE ISLE UTILITIES DISTRICT | ME0091310 | 6,128 | Groundwater under influence of surface water | 1 | No available average above comparison levels |
| RUMFORD WATER DISTRICT | ME0091380 | 4,050 | Ground water | 2 | No available average above comparison levels |
| SACO RIVER APARTMENTS | ME0092710 | 30 | Ground water | 1 | No available average above comparison levels |
| SANFORD WATER DISTRICT | ME0091410 | 14,328 | Ground water | 6 | Above an EPA comparison level |
| SOUTH BERWICK WATER DISTRICT | ME0091470 | 3,722 | Ground water | 4 | No available average above comparison levels |
| TOWN OF BAR HARBOR- WATER DIVISION | ME0090120 | 4,443 | Surface water | 1 | No available average above comparison levels |
| VAN BUREN WATER DISTRICT | ME0091540 | 2,190 | Ground water | 1 | No available average above comparison levels |
| YARMOUTH WATER DISTRICT | ME0091670 | 8,000 | Ground water | 4 | Above an EPA comparison level |
| YORK WATER DISTRICT | ME0091680 | 13,675 | Surface water | 1 | No available average above comparison levels |
What is included
Each active community water system with enough required samples for a yearly average is counted once, even if it is linked with several ZIP codes. Private wells are excluded, and UCMR 5 did not comprehensively monitor every small system.