Photo: Jeffrey Beall · CC BY 4.0Living in New Underwood, SD: what to set up and who to call
Tap water in New Underwood comes from the New Underwood water system, which has a clean five-year EPA record (about 22% of systems its size had a health-based violation) and a latest lead result of 1.0 ppb. The ER is a drive from New Underwood: the closest is Monument Health Rapid City Hospital, 18.7 miles away.
I’m new in town
What to set up in New Underwood, 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 New Underwood.
Power comes from Black Hills Energy
Black Hills Energy (Black Hills Power, Inc.), an investor-owned utility, serves all of New Underwood. 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 New Underwood water system
The New Underwood water system supplies almost all of New Underwood. It draws ground water and serves 679 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 5,327 systems serving 501–1,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2023, was 1.0 ppb, below the 15 ppb action level that applied. That’s lower than 51% 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. SD4600224.
3 home internet providers serve New Underwood
100% of 254 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Golden West Telecommunications | Fiber | 100% | 1,000/1,000 |
| Verizon | Fixed wireless | 86% | 300/20 |
| T-Mobile | Fixed wireless | 81% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have New Underwood’s trash rules yet
Pickup rules, the dump and recycling in New Underwood.
Where your child goes to school
Public school districts and the school path by grade.
New Underwood is in New Underwood School District 51-3.
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 Sep 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
New Underwood is in ZIP code 57761
ZIP codes where New Underwood residents live, with the share of the town in each.
| ZIP | Post office name | Share of New Underwood | ZIP’s residents in New Underwood |
|---|---|---|---|
| 57761 | New Underwood, SD | 100% | 50% |
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 New Underwood
Who supplies New Underwood’s drinking water, and has it had violations?
The New Underwood water system (EPA ID SD4600224). It reported no health-based violations to EPA in the five years to October 2026; 78% of systems its size had none. Its latest lead 90th percentile was 1.0 ppb (Jan–Dec 2023), against a 15 ppb action level.
Who provides electricity in New Underwood?
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 New Underwood?
Golden West Telecommunications, Verizon, T-Mobile (FCC, as of December 2025).
What ZIP codes are in New Underwood?
57761. Census 2020 ZIP Code Tabulation Areas.
What school district is New Underwood in?
New Underwood School District 51-3.
How do I register to vote in New Underwood?
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.