Hancock County, Maine — public water systems
At a glance
203 active public water systems are filed under Hancock County, Maine in EPA's SDWIS records, together reporting 47,019 people served. The largest is Town of Bar Harbor- Water Division, which reports serving 4,443 people. 30 are community water systems serving people where they live; the other 173 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
203
Population served
47K
Community systems
30
Groundwater share
95.1%
How does Hancock County compare with other Maine counties?
Hancock County has the 2nd-most active public water systems among the 17 counties listed for active Maine systems in EPA records; among the 16 with 3 or more systems, the median has 105. Its systems report 47,019 people served in total, the 6th-largest county figure in the state and 5% of the statewide total. The average system here reports serving 232 people, about half of the Maine average of 503. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does Hancock County's drinking water come from?
By primary water source, Hancock County's active systems draw on groundwater (192, 95%), surface water (8, 3.9%), purchased surface water (2, 1%) and groundwater under influence of surface water (1, 0.5%). Overall, 95% rely mainly on groundwater (including purchased groundwater) and 4.9% on surface water, compared with 96% and 3.7% across Maine. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Town of Bar Harbor- Water Division, draws primarily on surface water.
What kinds of water systems operate in Hancock County?
Hancock County's active systems break down as 30 community systems (15%), 42 non-transient non-community systems (21%) and 131 transient non-community systems (65%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (77%), local government (15%), federal government (6.4%) and state government (1.5%).
The 50 largest water systems in Hancock County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Town of Bar Harbor- Water Division | Hancock | 4,443 | Community | Surface water |
| 2 | Ellsworth Water Department | Hancock | 3,910 | Community | Surface water |
| 3 | Southwest Harbor Water & Sewer District | Hancock | 2,480 | Community | Surface water |
| 4 | Maine Water Company Bucksport Division | Hancock | 1,700 | Community | Surface water |
| 5 | Mount Desert Water Dist North | Hancock | 1,623 | Community | Surface water |
| 6 | Castine Water Department | Hancock | 983 | Community | Groundwater under influence of surface water |
| 7 | Us Nps Jordan Pond Hse (18) | Hancock | 888 | Transient non-community | Groundwater |
| 8 | Mount Desert Water Dist -Seal | Hancock | 865 | Community | Surface water |
| 9 | Asticou Inn | Hancock | 760 | Transient non-community | Groundwater |
| 10 | Winter Harbor Water District | Hancock | 700 | Community | Groundwater |
| 11 | Stonington Water Company | Hancock | 683 | Community | Groundwater |
| 12 | Aos 91 Mt Desert Island High School | Hancock | 615 | Non-transient non-community | Groundwater |
| 13 | Timberland Acres Campground | Hancock | 565 | Transient non-community | Groundwater |
| 14 | Narrows Too Campground | Hancock | 525 | Transient non-community | Groundwater |
| 15 | Hadleys Point Campground | Hancock | 505 | Transient non-community | Groundwater |
| 16 | Us Nps Sieur De Monts (2) | Hancock | 500 | Transient non-community | Groundwater |
| 17 | Us Nps Cadillac Mtn (8) | Hancock | 500 | Transient non-community | Groundwater |
| 18 | Mt Desert Narrows Campground | Hancock | 499 | Transient non-community | Groundwater |
| 19 | Blaze Blue Hill | Hancock | 450 | Transient non-community | Groundwater |
| 20 | Franklin Water Department | Hancock | 443 | Community | Groundwater |
| 21 | Patten Pond Camping Resort | Hancock | 430 | Transient non-community | Groundwater |
| 22 | Lucerne Inn | Hancock | 422 | Transient non-community | Groundwater |
| 23 | Northern Light Blue Hill | Hancock | 409 | Non-transient non-community | Groundwater |
| 24 | Bar Harbor Koa Oceanside-West Side | Hancock | 401 | Transient non-community | Groundwater |
| 25 | Big Cats Catering-Tiny Tykes Daycare | Hancock | 383 | Non-transient non-community | Groundwater |
| 26 | Mount Desert Campground | Hancock | 375 | Transient non-community | Groundwater |
| 27 | Camp Beech Cliff | Hancock | 350 | Transient non-community | Groundwater |
| 28 | Msu 93 Blue Hill Consolidated School | Hancock | 319 | Non-transient non-community | Groundwater |
| 29 | Bunkers Seafood and Spirits | Hancock | 319 | Transient non-community | Groundwater |
| 30 | Blue Hill Public Library | Hancock | 318 | Transient non-community | Groundwater |
| 31 | Balsam Cove Campground | Hancock | 314 | Transient non-community | Groundwater |
| 32 | Lawrence Family Fitness Center | Hancock | 309 | Transient non-community | Groundwater |
| 33 | Long Pond Water District | Hancock | 308 | Community | Surface water |
| 34 | George Stevens Academy | Hancock | 308 | Non-transient non-community | Groundwater |
| 35 | Cold Spring Water Company | Hancock | 305 | Community | Groundwater |
| 36 | Bass Harbor Campground | Hancock | 305 | Transient non-community | Groundwater |
| 37 | Abels Lobster Pound | Hancock | 301 | Transient non-community | Groundwater |
| 38 | Hancock Pour House | Hancock | 300 | Transient non-community | Groundwater |
| 39 | Arborvine Restaurant & Brewery | Hancock | 296 | Transient non-community | Groundwater |
| 40 | Terramor Outdoor Resort | Hancock | 292 | Transient non-community | Groundwater |
| 41 | Smugglers Den | Hancock | 289 | Transient non-community | Groundwater |
| 42 | Msu 76 Deer Isle/Stonington K-8 School | Hancock | 286 | Non-transient non-community | Groundwater |
| 43 | Causeway Club Inc. | Hancock | 270 | Transient non-community | Groundwater |
| 44 | The Pickled Wrinkle | Hancock | 267 | Transient non-community | Groundwater |
| 45 | Us Nps Schoodic Woods Campground | Hancock | 264 | Transient non-community | Groundwater |
| 46 | Marlintinis Grill Inc. | Hancock | 252 | Transient non-community | Groundwater |
| 47 | Us Nps Echo Lake (12) | Hancock | 250 | Transient non-community | Groundwater |
| 48 | Islesford Dock Restaurant | Hancock | 240 | Transient non-community | Groundwater |
| 49 | Camp Jordan | Hancock | 235 | Transient non-community | Groundwater |
| 50 | Aragosta at Goose Cove | Hancock | 226 | Transient non-community | Groundwater |
All other water systems in Hancock County (153)
The remaining active systems filed under Hancock County, largest first, with the population each reports serving.
- Wild Acadia Camping Resort225
- Kidspeace-New England-Medical Dorm225
- Acadia Lobster Co222
- Hancock Grammar School219
- Deer Isle Consumer Owned Water Utility219
- Rsu 24 Mountain View School200
- Bucksport Golf Club200
- Camp Jordan-King Hall200
- Dedham Elementary School197
- Ruth & Wimpys Restaurant Inc.192
- Best Western Acadia Park Inn192
- Crocker House Country Inn184
- Narrows Too Rec Center180
- Bucks180
- Strong'S Public House & Patio180
- Brooklin Inn180
- Ironbound Restaurant & Inn179
- Forest Ridge Campground177
- Airline Lodge & Snack Bar177
- Bucksport/Fort Knox Koa176
- Seafood Ketch Restaurant174
- Gateway Lunts Lobster Pound168
- Woodenboat Pub - Mt Ash Dorm167
- Surry Elementary School166
- Trenton School165
- The Black Sheep160
- Sun Hancock Heights- East158
- Mdoc State Park-Lamoine155
- Sun Hancock Heights-West155
- White Birches Motel154
- Trenton Health Center151
- Quarry Ledge Campground148
- Haystack Mtn Schl of Crafts #1147
- Aos 91 Tremont Consolidated School145
- Branch Lake Camping Area142
- The Maine Lobster Lady135
- Appalachian Mountain Club-Echo Lake134
- Currents134
- Merrill Blueberry Farms133
- Chippers Restaurant & Deli130
- Under Canvas Acadia130
- Msu 76 Deer Isle-Stonington Jr/Sr Hs130
- Us Nps Acadia Natl Park Hq120
- Acadia Gateway-Bus Maintenance Facility120
- Quietside Campground & Cabins120
- Parker Ridge Retirement Community120
- Jordans Snack Bar120
- Thurstons Lobster Pound120
- Rsu 24 Peninsula Elementary School117
- Mdi Bio Lab116
- Acadia Seashore Camping & Cabins114
- Alamoosook Lakeside Inn112
- Otis School Dept-Beech Hill School112
- Silver Lake Estates110
- Bay School105
- Birch Tree Meadows MHP105
- Trenton Bridge Lobster Pound104
- The Talaria Company LLC (Bldg 1)104
- Oceanfront Camping@ Reach Knolls103
- Us Nps Fabbri Memorial (14)100
- Hancock County-Bar Harbor Airport100
- Msu 76 Sedgwick Elementary School99
- Bar Harbor Oceanside Koa-East Side98
- Blue Hill Country Club97
- Woodenboat Publications-Parsons97
- Siam Sky Thai Cuisine96
- Atlantic Brewing Co-Mainely Meat Bbq95
- Hewins Drive Realty LLC95
- Greenlaws Rv Park & Campground94
- Msu 93 Penobscot Elementary School94
- Island Medical Center90
- Center Harbor Yacht Club88
- Island View Hotel84
- Rsu 24 Cave Hill School83
- The Lookout Inn Inc.83
- West Bay Acadia Resort77
- The Hinckley Co - 44-Plant-Bldg 277
- Volta75
- Hancock Village MHP73
- Summit Learning Center71
- Blue Hill Co-Op-South Street70
- Island Country Club70
- Hannaford-Blue Hill70
- Sherwood Forest MHP68
- Fish Net68
- Msu 93 Brooksville Elementary School66
- Msu 76 Brooklin Elementary School63
- Farm Stand Coffee House60
- Molasses Pond House60
- Us Nps Jordan Pond Dorm (17)60
- Blue Hill Terrace60
- Deer Run Apts60
- Acadia Gateway Motel/Cottages60
- West Eden Common60
- Ellsworth Giant Sub57
- Wanderin Moose LLC55
- Kidspeace-New England-Cafeteria55
- Crescent Mobile Home Park55
- Hiram Blake Camp54
- Barncastle Hotel & Restaurant52
- Orland Community Center50
- Coastal Estates48
- Acadia Sunrise Motel48
- Morris Yachts45
- Harriman Cove Park LLC45
- Benjamin River Apts45
- Great Pond Campground45
- Spinsfield Commons45
- Flanders Bay Cabins & Bbq44
- Ferncrest Acadia Campground44
- Stonington Manor44
- Birch Haven Trailer Park43
- Wymans Hancock Freezer Dba Rtwb43
- Isleview Motel & Cottages40
- Harbor View I & Ii40
- Lucerne Beach Club40
- Stanley Subaru40
- Acadia Sunnyside Motel & Cottages40
- Csd 8 Airline Community School39
- South Penobscot Water Association38
- Downeast Eye Md37
- Home Inc. & Learning Center36
- Camp Capella36
- Blueberry Hill Dairy Bar36
- Us Nps Acadia Natl Pk-Schoodic Facility35
- Msad 76 Swans Island School35
- Sullivan Town Office35
- The Growing Patch Childcare Center34
- Acadia Yurts & Wellness Center33
- Golden Sun Child Care33
- Us Nps White Birches Campground33
- Oceanarium and Education Center32
- Cn Brown-Big Apple-Orland32
- Acadia Wilderness Lodge32
- Four Acre Woods Campground32
- Downeast Horizons Inc.31
- Snappers29
- Home Market Stand & Soup Kitchen28
- Sunset Condo Association28
- Smugglers Den Campground 225
- Wild Acadia Campfire Cafe25
- Happy Clam Shack25
- Great Pond- Rec Hall25
- Acadia Gateway-Vistor Center25
- Versant Power-Lamoine Service25
- Us Nps Thompson Isl Park (11)25
- The Dunbar Store25
- Rh Foster Somesville Freshies25
- Sorrento/Sullivan Rec Center25
- Dollar General-Sullivan25
- Us Nps Frazer Point (3)25
- Hansens Outpost25
- Amherst General Store25
Hancock County water systems: frequently asked questions
How many public water systems are in Hancock County, Maine?
EPA's SDWIS records file 203 active public water systems under Hancock County, Maine: 30 community systems (15%), 42 non-transient non-community systems (21%) and 131 transient non-community systems (65%).
Who supplies drinking water in Hancock County, ME?
The largest community water systems filed under Hancock County are Town of Bar Harbor- Water Division (4,443 people served), Ellsworth Water Department (3,910 people served) and Southwest Harbor Water & Sewer District (2,480 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does Hancock County's drinking water come from groundwater or surface water?
Of the 203 active public water systems in Hancock County, 95% draw mainly on groundwater and 4.9% on surface water, counting purchased supplies. The largest system, Town of Bar Harbor- Water Division, uses surface water.
Where can I find a water quality report for Hancock County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 30 community systems are filed under Hancock County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in Hancock County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Maine water systems
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Public water systems in Hancock County, Maine”, https://aquacensus.com/water-systems/maine/hancock (data as of October 1, 2026).