Living in Wentworth Township, SD: what to set up and who to call
Tap water in most of Wentworth Township comes from Big Sioux Community Water System, which has a clean five-year EPA record (about 20% of systems its size had a health-based violation) and a latest lead result of 1.0 ppb. For home internet, most of Wentworth Township can choose between ITC and Midco.
I’m new in town
What to set up in Wentworth 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 Wentworth Township.
Power comes from Xcel Energy
Xcel Energy (Northern States Power Co. (Minnesota)), an investor-owned utility, serves all of Wentworth Township. Its homes paid an average of 13.1¢ per kWh in 2025, about $101 a month (its average across South Dakota).
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Big Sioux Community Water System
Big Sioux Community Water System supplies Wentworth Township: about 51% of residents live in its service area. About 49% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws ground water (EPA lists Minnehaha Community Water Corp as seller) and serves 5,800 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 1.0 ppb, below the 15 ppb action level that applied. That’s lower than 57% 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. SD4600429.
7 home internet providers serve Wentworth Township
100% of 492 addresses can get 100/20 Mbps; 89% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| ITC | Fiber | 79% | 1,000/1,000 |
| Midco | Cable, Fixed wireless | 58% | 2,000/350 |
| Interlakes Wireless | Fixed wireless | 91% | 100/20 |
| Verizon | Fixed wireless | 57% | 300/20 |
| GigFire | Fixed wireless | 56% | 150/130 |
| AT&T | Fixed wireless | 25% | 25/3 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Wentworth Township’s trash rules yet
Pickup rules, the dump and recycling in Wentworth Township.
Where your child goes to school
Public school districts and the school path by grade.
Most of Wentworth Township (81%) is in Chester School District 39-1; parts are in Colman-Egan School District 50-5 (9%) and Madison Central School District 39-2 (8%) and Oldham-Ramona-Rutland 39-6 (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 Jul 2023; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Wentworth Township is in ZIP code 57075
ZIP codes where Wentworth Township residents live, with the share of the town in each.
| ZIP | Post office name | Share of Wentworth Township | ZIP’s residents in Wentworth Township |
|---|---|---|---|
| 57075 | Wentworth, SD | 100% | 45% |
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 Wentworth Township
Who supplies Wentworth Township’s drinking water, and has it had violations?
Big Sioux Community Water System (EPA ID SD4600429). 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 1.0 ppb (Jan–Dec 2024), against a 15 ppb action level.
Who provides electricity in Wentworth Township?
Xcel Energy (Northern States Power Co. (Minnesota)), an investor-owned utility. Its homes paid about 13.1¢ per kWh in 2025 (EIA).
What internet providers serve Wentworth Township?
ITC, Midco, Interlakes Wireless, Verizon, GigFire, AT&T (FCC, as of December 2025).
What ZIP codes are in Wentworth Township?
57075. Census 2020 ZIP Code Tabulation Areas.
What school district is Wentworth Township in?
Chester School District 39-1. Parts of the city are in Colman-Egan School District 50-5 and Madison Central School District 39-2 and Oldham-Ramona-Rutland 39-6.
How do I register to vote in Wentworth 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 Lake 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.