Photo: Jeffrey Beall · CC BY 4.0Living in Rapid Valley, SD: what to set up and who to call
Rapid Valley has no town government of its own, so Pennington County runs its elections and most services, and its children attend Rapid City School District 51-4. For emergencies, Rapid Valley is closest to Monument Health Rapid City Hospital, 4.5 miles away.
I’m new in town
What to set up in Rapid Valley, 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 Rapid Valley.
Power comes from Black Hills Energy
Black Hills Energy (Black Hills Power, Inc.), an investor-owned utility, serves all of Rapid Valley. 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 Rapid Valley Sanitary District
Rapid Valley Sanitary District supplies Rapid Valley: about 84% of residents live in its service area. Rapid City serves another 10%. About 8% 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 11,408 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 83% of the 3,525 systems serving 10,001–50,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–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. SD4600274.
6 home internet providers serve Rapid Valley
100% of 3,075 addresses can get 100/20 Mbps; 24% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Midco | Cable, Fiber | 100% | 2,000/1,000 |
| Bluepeak | Cable, Fiber | 84% | 5,000/5,000 |
| CenturyLink | DSL | 4% | 10/1 |
| AT&T | Fixed wireless | 57% | 25/3 |
| Verizon | Fixed wireless | 42% | 300/20 |
| T-Mobile | Fixed wireless | 26% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Rapid Valley’s trash rules yet
Pickup rules, the dump and recycling in Rapid Valley.
Where your child goes to school
Public school districts and the school path by grade.
Most of Rapid Valley (54%) is in Rapid City School District 51-4; parts are in Douglas School District 51-1 (46%).
CSchool gradeSee 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
Rapid Valley is unincorporated, so Pennington County is the local government.
Election office: FVAP local election office directory, updated Sep 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Rapid Valley is in ZIP code 57703
ZIP codes where Rapid Valley residents live, with the share of the town in each.
| ZIP | Post office name | Share of Rapid Valley | ZIP’s residents in Rapid Valley |
|---|---|---|---|
| 57703 | Rapid City, SD | 100% | 48% |
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 Rapid Valley
Who supplies Rapid Valley’s drinking water, and has it had violations?
Rapid Valley Sanitary District (EPA ID SD4600274). It reported no health-based violations to EPA in the five years to October 2026; 83% of systems its size had none. Its latest lead 90th percentile was 3.0 ppb (Jan–Dec 2024), against a 15 ppb action level.
Who provides electricity in Rapid Valley?
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 Rapid Valley?
Midco, Bluepeak, CenturyLink, AT&T, Verizon, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Rapid Valley?
57703. Census 2020 ZIP Code Tabulation Areas.
What school district is Rapid Valley in?
Rapid City School District 51-4. Parts of the city are in Douglas School District 51-1.
How do I register to vote in Rapid Valley?
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 Pennington 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.