Living in South Hills, MT: what to set up and who to call
Helena Water System reported 3 health-based violations to EPA in the last five years: disinfection byproducts (HAA5) ×3. 83% of systems its size reported none. South Hills has no town government of its own, so Jefferson County runs its elections and most services, and its children attend Jefferson High School District.
I’m new in town
What to set up in South Hills, 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 South Hills.
Power comes from NorthWestern Energy
NorthWestern Energy (NorthWestern Energy LLC - (MT)), an investor-owned utility, serves all of South Hills. Its homes paid an average of 14.4¢ per kWh in 2025, about $102 a month (its average across Montana, for customers on its standard service). Montana lets you buy power from another supplier; 0% of NorthWestern Energy’s home customers do, and NorthWestern Energy still delivers it.
Start or move service: northwesternenergy.com · (888) 467-2669
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Helena Water System
Helena Water System supplies South Hills: 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 surface water and serves 32,091 people in all.
3 health-based violations reported to EPA in the five years to October 2026: disinfection byproducts (HAA5) ×3, the latest beginning Jan 2023. 83% of the 3,525 systems serving 10,001–50,000 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2022–Dec 2024, was 3.0 ppb, below the 15 ppb action level that applied. That’s higher than 79% 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. MT0000241.
5 home internet providers serve South Hills
44% of 249 addresses can get 100/20 Mbps; 14% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| The Montana Internet | Fixed wireless, Fiber | 82% | 1,000/1,000 |
| Spectrum | Cable, Fiber | 21% | 1,000/1,000 |
| CenturyLink | DSL | 21% | 40/5 |
| Verizon | Fixed wireless | 41% | 300/20 |
| AT&T | Fixed wireless | 4% | 25/3 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
The nearest public drop-off is 4 miles away
Pickup rules, the dump and recycling in South Hills.
Helena Solid Waste Department
This isn’t South Hills’ own facility. Whether South Hills residents may use it is the town’s rule: check the town’s office.
OpenStreetMap, as of Oct 9, 2026. © OpenStreetMap contributors.
Where your child goes to school
Public school districts and the school path by grade.
South Hills is in two districts that split the grades: Jefferson High School District and Montana City 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
South Hills is unincorporated, so Jefferson County is the local government.
Election office: FVAP local election office directory, updated Sep 2021; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
South Hills is in ZIP code 59634
ZIP codes where South Hills residents live, with the share of the town in each.
| ZIP | Post office name | Share of South Hills | ZIP’s residents in South Hills |
|---|---|---|---|
| 59634 | Clancy, MT | 100% | 12% |
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 South Hills
Who supplies South Hills’ drinking water, and has it had violations?
Helena Water System (EPA ID MT0000241). It reported 3 health-based violations to EPA in the five years to October 2026: disinfection byproducts (HAA5) ×3. 83% of systems its size had none. Its latest lead 90th percentile was 3.0 ppb (Jan 2022–Dec 2024), against a 15 ppb action level.
Who provides electricity in South Hills?
NorthWestern Energy (NorthWestern Energy LLC - (MT)), an investor-owned utility. Its homes paid about 14.4¢ per kWh in 2025 (EIA).
What internet providers serve South Hills?
The Montana Internet, Spectrum, CenturyLink, Verizon, AT&T (FCC, as of December 2025).
What ZIP codes are in South Hills?
59634. Census 2020 ZIP Code Tabulation Areas.
What school district is South Hills in?
Jefferson High School District and Montana City Elementary School District.
How do I register to vote in South Hills?
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 Jefferson 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.