County · Maine
Hancock County, Maine: drinking water records
This overview covers 40 ZIP codes and 31 community water systems in Hancock County. It also stands in for 27 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 |
|---|---|---|---|---|---|
| Ellsworth Water Department ME0090520 | 3,910 | 120 | 0 | 5 | 4 ppb |
| Town of Bar Harbor- Water Division ME0090120 | 4,443 | 120 | 2 | 0 | 3.4 ppb |
| Southwest Harbor Water & Sewer District ME0091490 | 2,480 | 0 | 0 | 7 | 2.1 ppb |
| Stonington Water Company ME0091510 | 683 | 0 | 0 | 5 | 1.3 ppb |
| Franklin Water Department ME0090570 | 443 | 60 | 4 | 0 | 3.6 ppb |
| Long Pond Water District ME0090890 | 308 | 0 | 0 | 20 | 4 ppb |
| Parker Ridge Retirement Community ME0092265 | 120 | 0 | 0 | 1 | 20.8 ppb |
| Birch Tree Meadows MHP ME0095663 | 105 | 0 | 0 | 3 | 0.7 ppb |
| Hancock Village MHP ME0002527 | 73 | 0 | 0 | 1 | 0 ppb |
| Sherwood Forest MHP ME0015106 | 68 | 0 | 0 | 3 | 6.7 ppb |
| Blue Hill Terrace ME0092110 | 60 | 0 | 0 | 4 | 8.9 ppb |
| Spinsfield Commons ME0095655 | 45 | 0 | 0 | 3 | 0 ppb |
| Stonington Manor ME0092120 | 44 | 0 | 0 | 6 | 8.4 ppb |
| Birch Haven Trailer Park ME0007233 | 43 | 0 | 0 | 1 | 9.6 ppb |
| Harbor View I & II ME0092165 | 40 | 0 | 0 | 2 | 1.2 ppb |
| Maine Water Company Bucksport Division ME0090280 | 1,700 | 0 | 0 | 0 | 2 ppb |
| Mount Desert Water Dist North ME0091140 | 1,623 | 0 | 0 | 0 | 2.5 ppb |
| Castine Water Department ME0090330 | 983 | 0 | 0 | 0 | 0 ppb |
| Pequot Highlands MA3258001 | 900 | 0 | 0 | 0 | 0 ppb |
| Mount Desert Water Dist -Seal ME0091420 | 865 | 0 | 0 | 0 | 2.2 ppb |
| Winter Harbor Water District ME0091630 | 700 | 0 | 0 | 0 | 1.4 ppb |
| Cold Spring Water Company ME0090360 | 305 | 0 | 0 | 0 | 0.7 ppb |
| Sun Hancock Heights- East ME0007242 | 158 | 0 | 0 | 0 | 3.5 ppb |
| Sun Hancock Heights-West ME0107242 | 155 | 0 | 0 | 0 | 0 ppb |
| Silver Lake Estates ME0092722 | 110 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Hancock 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: 04408, 04431, 04476, 04607, 04612, 04613, 04616, 04617, 04624, 04625, 04627, 04635, 04642, 04646, 04650, 04653, 04660, 04669, 04673, 04674, 04675, 04676, 04677, 04681, 04683, 04684, 04685.
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.