Living in Twin Hills Colony, MT: what to set up and who to call
Tiber County Water District reported 2 health-based violations to EPA in the last five years: disinfection byproducts (HAA5) ×2. 78% of systems its size reported none. Twin Hills Colony has no town government of its own, so Chouteau County runs its elections and most services, and its children attend Fort Benton High School District.
I’m new in town
What to set up in Twin Hills Colony, 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 Twin Hills Colony.
Power comes from Hill County Electric Coop
Hill County Electric Coop (Hill County Electric Coop, Inc), a cooperative utility, serves all of Twin Hills Colony.
Start or move service: www.hcelectric.com · (406) 394-7804
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Tiber County Water District
Tiber County Water District supplies almost all of Twin Hills Colony. It draws surface water and serves 750 people in all.
2 health-based violations reported to EPA in the five years to October 2026: disinfection byproducts (HAA5) ×2, the latest beginning Oct 2023. 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 2021–Dec 2023, was 2.0 ppb, below the 15 ppb action level that applied. That’s higher than 70% 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. Violations are counted by the start of their compliance period. MT0000400.
1 home internet providers serve Twin Hills Colony
100% of 1 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| 3 Rivers Communications | Fiber | 100% | 1,000/1,000 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Twin Hills Colony’s trash rules yet
Pickup rules, the dump and recycling in Twin Hills Colony.
Where your child goes to school
Public school districts and the school path by grade.
Twin Hills Colony is in two districts that split the grades: Fort Benton High School District and Knees Elementary School District.
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.
No town hall: the county runs things
Twin Hills Colony is unincorporated, so Chouteau County is the local government.
Election office: FVAP local election office directory, updated Jan 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Twin Hills Colony is in ZIP code 59420
ZIP codes where Twin Hills Colony residents live, with the share of the town in each.
| ZIP | Post office name | Share of Twin Hills Colony | ZIP’s residents in Twin Hills Colony |
|---|---|---|---|
| 59420 | Carter, MT | 100% | 18% |
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 Twin Hills Colony
Who supplies Twin Hills Colony’s drinking water, and has it had violations?
Tiber County Water District (EPA ID MT0000400). It reported 2 health-based violations to EPA in the five years to October 2026: disinfection byproducts (HAA5) ×2. 78% of systems its size had none. Its latest lead 90th percentile was 2.0 ppb (Jan 2021–Dec 2023), against a 15 ppb action level.
Who provides electricity in Twin Hills Colony?
Hill County Electric Coop (Hill County Electric Coop, Inc), a cooperative utility.
What internet providers serve Twin Hills Colony?
3 Rivers Communications (FCC, as of December 2025).
What ZIP codes are in Twin Hills Colony?
59420. Census 2020 ZIP Code Tabulation Areas.
What school district is Twin Hills Colony in?
Fort Benton High School District and Knees Elementary School District.
How do I register to vote in Twin Hills Colony?
Montana has no online registration; you can register in person up to and including Election Day or by mail (postmarked 30 days before). Elections here are run by the Chouteau County Election Administrator. Check your registration at prodvoterportal.mt.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 Nov 18, 2024 (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.