Photo: Jared Winkler · CC BY-SA 4.0Living in Mission, SD: what to set up and who to call
Tap water in most of Mission comes from Mission 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 0.6 ppb. Power in Mission comes from LaCreek Electric Assn, a cooperative utility rather than a private company.
I’m new in town
What to set up in Mission, 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 Mission.
Power comes from LaCreek Electric Assn
LaCreek Electric Assn (LaCreek Electric Assn, Inc), a cooperative utility, serves all of Mission.
Start or move service: lacreek.com · (605) 685-6581
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Mission Water System
Mission Water System supplies Mission: about 72% of residents live in its service area. Rosebud Rural Water System serves another 29%. About 14% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It buys treated surface water (EPA lists Sicangu Mni Wiconi Rural Water System as seller) and serves 1,500 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 7,966 systems serving 1,001–3,300 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2025, was 0.6 ppb, below the 15 ppb action level that applied. The highest in five years was 3.1 ppb. That’s lower than 58% 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. 084690532.
2 home internet providers serve Mission
100% of 329 addresses can get 100/20 Mbps; 95% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Golden West Telecommunications | Fiber, Cable | 100% | 1,000/1,000 |
| T-Mobile | Fixed wireless | 22% | 25/3 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Mission’s trash rules yet
Pickup rules, the dump and recycling in Mission.
Where your child goes to school
Public school districts and the school path by grade.
Mission is in Todd County School District 66-1.
D−School gradeSee 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.
Mission is in ZIP code 57555
ZIP codes where Mission residents live, with the share of the town in each.
| ZIP | Post office name | Share of Mission | ZIP’s residents in Mission |
|---|---|---|---|
| 57555 | Mission, SD | 100% | 29% |
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 Mission
Who supplies Mission’s drinking water, and has it had violations?
Mission Water System (EPA ID 084690532). 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 0.6 ppb (Jan–Dec 2025), against a 15 ppb action level.
Who provides electricity in Mission?
LaCreek Electric Assn (LaCreek Electric Assn, Inc), a cooperative utility.
What internet providers serve Mission?
Golden West Telecommunications, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Mission?
57555. Census 2020 ZIP Code Tabulation Areas.
What school district is Mission in?
Todd County School District 66-1.
How do I register to vote in Mission?
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 Todd 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.