County · Maine
Penobscot County, Maine: drinking water records
This overview covers 41 ZIP codes and 49 community water systems in Penobscot County. It also stands in for 14 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Bangor Water District ME0090110 | 27,298 | 120 | 0 | 0 | 7.5 ppb |
| Brewer Water Department ME0090220 | 8,860 | 120 | 0 | 0 | 2.1 ppb |
| Old Town Water District ME0091200 | 7,648 | 60 | 0 | 0 | 6.3 ppb |
| Orono-Veazie Water District ME0091210 | 5,793 | 60 | 0 | 0 | 10 ppb |
| Maine Water Company Millinocket Division ME0090990 | 5,400 | 120 | 0 | 0 | 2.8 ppb |
| Hampden Water District ME0090660 | 4,628 | 360 | 0 | 0 | 3.0 ppb |
| Homestead Estates LLC ME0095640 | 125 | 0 | 0 | 2 | 6.3 ppb |
| Hingham Heights ME0095699 | 90 | 0 | 0 | 5 | 0.7 ppb |
| Holden Square Apartments ME0092155 | 63 | 0 | 0 | 1 | 2.8 ppb |
| Sunny Gables- Glenburn Housing ME0090615 | 60 | 0 | 0 | 4 | 3.2 ppb |
| George Pond Estates LLC ME0007372 | 50 | 0 | 0 | 1 | 0 ppb |
| Greenwood Garden Apartments ME0092327 | 50 | 0 | 0 | 2 | 5.3 ppb |
| Maple Ridge Mobile Home Park ME0095340 | 50 | 0 | 0 | 1 | 0 ppb |
| Town & Country Trailer Park ME0008921 | 48 | 0 | 0 | 1 | 1.4 ppb |
| Mattawamkeag Housing Corp ME0090949 | 33 | 0 | 0 | 1 | 6.8 ppb |
| Lincoln Water District ME0090860 | 3,020 | 0 | 0 | 0 | 1.0 ppb |
| Dexter Utility District ME0090440 | 2,338 | 0 | 0 | 0 | 3.8 ppb |
| East Millinocket Water Works ME0091150 | 2,133 | 0 | 0 | 0 | 2.8 ppb |
| Newport Water District ME0091100 | 1,900 | 0 | 0 | 0 | 1.3 ppb |
| Howland Water Department ME0090710 | 1,025 | 0 | 0 | 0 | 1.9 ppb |
| Mountain View Correctional Facility ME0090342 | 468 | 0 | 0 | 0 | 0.5 ppb |
| Patten Water Dept ME0091240 | 338 | 0 | 0 | 0 | 2.4 ppb |
| Streamside Pines Mobile Home Park ME0001363 | 183 | 0 | 0 | 0 | 3.5 ppb |
| Country Mobile Home Park ME0007543 | 155 | 0 | 0 | 0 | 1.4 ppb |
| Plymouth Water District ME0092270 | 150 | 0 | 0 | 0 | 1.9 ppb |
ZIP reports in Penobscot County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 04410, 04417, 04435, 04449, 04455, 04460, 04475, 04487, 04488, 04493, 04495, 04777, 04932, 04939.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.