Photo: User:Magicpiano · CC BY-SA 4.0Living in Edgemont, SD: what to set up and who to call
The Edgemont water system reported one health-based violation to EPA in the last five years: a groundwater treatment requirement (Groundwater Rule), beginning Oct 2021. For an emergency, Fall River Hospital - Cah is the closest ER, 19.7 miles away.
I’m new in town
What to set up in Edgemont, 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 Edgemont.
Power comes from Black Hills Energy
Black Hills Energy (Black Hills Power, Inc.), an investor-owned utility, serves all of Edgemont. Its homes paid an average of 15.1¢ per kWh in 2025, about $106 a month (its average across South Dakota).
Start or move service: blackhillspower.com · (800) 742-8948
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Edgemont water system
The Edgemont water system supplies almost all of Edgemont. It draws ground water and serves 725 people in all.
1 health-based violation reported to EPA in the five years to October 2026: a groundwater treatment requirement (Groundwater Rule), beginning Oct 2021. 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–Dec 2023, was 3.0 ppb, below the 15 ppb action level that applied. That’s higher than 81% 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. SD4600114.
1 home internet providers serve Edgemont
100% of 560 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Golden West Telecommunications | 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 Edgemont’s trash rules yet
Pickup rules, the dump and recycling in Edgemont.
Where your child goes to school
Public school districts and the school path by grade.
Edgemont is in Edgemont School District 23-1.
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.
Edgemont is in ZIP code 57735
ZIP codes where Edgemont residents live, with the share of the town in each.
| ZIP | Post office name | Share of Edgemont | ZIP’s residents in Edgemont |
|---|---|---|---|
| 57735 | Edgemont, SD | 100% | 54% |
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 Edgemont
Who supplies Edgemont’s drinking water, and has it had violations?
The Edgemont water system (EPA ID SD4600114). It reported 1 health-based violation to EPA in the five years to October 2026: a groundwater treatment requirement (Groundwater Rule). 78% of systems its size had none. Its latest lead 90th percentile was 3.0 ppb (Jan–Dec 2023), against a 15 ppb action level.
Who provides electricity in Edgemont?
Black Hills Energy (Black Hills Power, Inc.), an investor-owned utility. Its homes paid about 15.1¢ per kWh in 2025 (EIA).
What internet providers serve Edgemont?
Golden West Telecommunications (FCC, as of December 2025).
What ZIP codes are in Edgemont?
57735. Census 2020 ZIP Code Tabulation Areas.
What school district is Edgemont in?
Edgemont School District 23-1.
How do I register to vote in Edgemont?
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 Fall River 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.