Photo: Public domain · Public domainLiving in Isle au Haut, ME: what to set up and who to call
Stonington Water Company reported 3 health-based violations to EPA in the last five years: disinfection byproducts (TTHM) ×2, radioactivity (gross alpha, excluding radon and uranium). 78% of systems its size reported none. Power in Isle au Haut comes from Matinicus Plantation Elec, a municipal utility rather than a private company.
I’m new in town
What to set up in Isle au Haut, and who provides it. Tap an answer for the details and where they come from.
Power, water and internet
Who to call to start service at a new address in Isle au Haut.
Power comes from Matinicus Plantation Elec
Matinicus Plantation Elec (Matinicus Plantation Elec Co), a municipal utility, serves all of Isle au Haut.
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Stonington Water Company
Stonington Water Company supplies Isle au Haut: about 16% of residents live in its service area. About 84% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws ground water and serves 683 people in all.
3 health-based violations reported to EPA in the five years to October 2026: disinfection byproducts (TTHM) ×2, radioactivity (gross alpha, excluding radon and uranium), the latest beginning Apr 2026. 78% of the 5,327 systems serving 501–1,000 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2023–Dec 2025, was 1.3 ppb, below the 15 ppb action level that applied. The highest in five years was 3.1 ppb. That’s higher than 59% of similar systems’ latest results.
The system’s full record: EPA ECHO report
EPA SDWIS via Envirofacts (violations pulled Oct 9, 2026) and ECHO (lead samples, 2026Q3); service area: EPA Community Water System Service Area Boundaries v3.0 (EPA’s estimate). Violations are counted by the start of their compliance period. ME0091510.
2 home internet providers serve Isle au Haut
93% of 86 addresses can get 100/20 Mbps; 93% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Axiom | Fiber | 95% | 1,000/1,000 |
| TDS Telecom | DSL | 56% | 50/10 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Isle au Haut’s trash rules yet
Pickup rules, the dump and recycling in Isle au Haut.
Where your child goes to school
Public school districts and the school path by grade.
Isle au Haut is in Isle au Haut.
Test scores and every school: see Schools →U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.
Town hall and registering to vote
Who to call, and how to register.
Election office: FVAP local election office directory, updated Oct 2026; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Isle au Haut is in ZIP code 04645
ZIP codes where Isle au Haut residents live, with the share of the town in each.
| ZIP | Post office name | Share of Isle au Haut | ZIP’s residents in Isle au Haut |
|---|---|---|---|
| 04645 | Isle Au Haut, ME | 100% | 100% |
Census 2020 ZIP Code Tabulation Areas, by census block; post office names: GeoNames (CC BY 4.0). ZIPs created since 2020 are missing.
Getting around, the ER and the library
One line each; the subject pages have the rest.
ER: CMS hospital data. Library: IMLS Public Libraries Survey, FY2024.
Questions about living in Isle au Haut
Who supplies Isle au Haut’s drinking water, and has it had violations?
Stonington Water Company (EPA ID ME0091510). It reported 3 health-based violations to EPA in the five years to October 2026: disinfection byproducts (TTHM) ×2, radioactivity (gross alpha, excluding radon and uranium). 78% of systems its size had none. Its latest lead 90th percentile was 1.3 ppb (Jan 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in Isle au Haut?
Matinicus Plantation Elec (Matinicus Plantation Elec Co), a municipal utility.
What internet providers serve Isle au Haut?
Axiom, TDS Telecom (FCC, as of December 2025).
What ZIP codes are in Isle au Haut?
04645. Census 2020 ZIP Code Tabulation Areas.
What school district is Isle au Haut in?
Isle au Haut.
How do I register to vote in Isle au Haut?
In Maine you can register online until 21 days before Election Day, in person up to and including Election Day, or by mail (received 21 days before). Elections here are run by the Isle Au Haut Town Clerk. Check your registration at maine.gov.
Sources & dates
Every answer above names its source. Here they are with their dates.
- Water: EPA SDWIS (Envirofacts, pulled Oct 9, 2026), ECHO SDWA 2026Q3, EPA CWS Service Area Boundaries v3.0.
- Power: HIFLD Electric Retail Service Territories (map Aug 2023); EIA-861 final 2025.
- Trash: OpenStreetMap, Geofabrik extract of Oct 9, 2026. © OpenStreetMap contributors (ODbL).
- ZIP codes: Census 2020 ZCTA relationship files; GeoNames postal codes (CC BY 4.0).
- Schools: NCES Common Core of Data, 2024–25.
- Registration: vote.gov, updated Aug 3, 2026 (read Oct 10, 2026). Official sites and area codes: Wikidata.
- Election office: FVAP local election office directory (fetched Oct 10, 2026; each record dated), EAC EAVS 2024 jurisdictions; registration and lookup links from vote.gov’s state data, checked Oct 10, 2026.
- Internet: FCC National Broadband Map, as of December 2025.