Living in Star Valley Township, SD: what to set up and who to call
Power in Star Valley Township comes from Rosebud Electric Coop, a cooperative utility rather than a private company. For an emergency, Wagner Community Memorial Hospital - Cah is the closest ER, 22.4 miles away.
I’m new in town
What to set up in Star Valley Township, 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 Star Valley Township.
Power comes from Rosebud Electric Coop
Rosebud Electric Coop (Rosebud Electric Coop Inc), a cooperative utility, serves all of Star Valley Township. Its homes paid an average of 11.9¢ per kWh in 2025, about $137 a month (its average across South Dakota).
Start or move service: rosebudelectric.com · (605) 835-9624
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Tripp County Water User District
Tripp County Water User District supplies almost all of Star Valley Township. It draws ground water and serves 4,860 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 80% of the 5,012 systems serving 3,301–10,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2024, was 2.0 ppb, below the 15 ppb action level that applied. The highest in five years was 3.0 ppb. That’s higher than 67% 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. SD4600520.
3 home internet providers serve Star Valley Township
98% of 46 addresses can get 100/20 Mbps; 98% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Golden West Telecommunications | Fiber | 96% | 1,000/1,000 |
| T-Mobile | Fixed wireless | 13% | 100/20 |
| Verizon | Fixed wireless | 2% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Star Valley Township’s trash rules yet
Pickup rules, the dump and recycling in Star Valley Township.
Where your child goes to school
Public school districts and the school path by grade.
Star Valley Township is in South Central School District 26-5.
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 Jul 2023; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Star Valley Township is in ZIP code 57335
ZIP codes where Star Valley Township residents live, with the share of the town in each.
| ZIP | Post office name | Share of Star Valley Township | ZIP’s residents in Star Valley Township |
|---|---|---|---|
| 57335 | Fairfax, SD | 100% | 33% |
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 Star Valley Township
Who supplies Star Valley Township’s drinking water, and has it had violations?
Tripp County Water User District (EPA ID SD4600520). It reported no health-based violations to EPA in the five years to October 2026; 80% of systems its size had none. Its latest lead 90th percentile was 2.0 ppb (Jan–Dec 2024), against a 15 ppb action level.
Who provides electricity in Star Valley Township?
Rosebud Electric Coop (Rosebud Electric Coop Inc), a cooperative utility. Its homes paid about 11.9¢ per kWh in 2025 (EIA).
What internet providers serve Star Valley Township?
Golden West Telecommunications, T-Mobile, Verizon (FCC, as of December 2025).
What ZIP codes are in Star Valley Township?
57335. Census 2020 ZIP Code Tabulation Areas.
What school district is Star Valley Township in?
South Central School District 26-5.
How do I register to vote in Star Valley Township?
South Dakota has no online registration; you can register in person until 15 days before Election Day or by mail (received 15 days before). Elections here are run by the Gregory County Auditor. Check your registration at vip.sdsos.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.