Living in Clearfield Colony, SD: what to set up and who to call
Clearfield Colony has no town government of its own, so Charles Mix County runs its elections and most services, and its children attend Tripp-Delmont School District 33-5. Tap water in Clearfield Colony comes from the Clearfield Colony water system, which has a clean five-year EPA record (about 23% of systems its size had a health-based violation) and a latest lead result below detection.
I’m new in town
What to set up in Clearfield Colony, 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 Clearfield Colony.
Power comes from NorthWestern Energy
NorthWestern Energy (NorthWestern Energy - (SD)), an investor-owned utility, serves all of Clearfield Colony. Its homes paid an average of 13.3¢ per kWh in 2025, about $125 a month (its average across South Dakota).
Start or move service: northwesternenergy.com · (800) 245-6977
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Clearfield Colony water system
The Clearfield Colony water system supplies almost all of Clearfield Colony. It draws ground water and serves 120 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 77% of the 15,074 systems serving 101–500 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2025, was 0.0 ppb, below the 15 ppb action level that applied. Results below detection are reported as 0, so 0 doesn’t mean no lead at any tap.
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. SD4602020.
1 home internet providers serve Clearfield Colony
100% of 4 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Midstate Communications | 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 Clearfield Colony’s trash rules yet
Pickup rules, the dump and recycling in Clearfield Colony.
Where your child goes to school
Public school districts and the school path by grade.
Clearfield Colony is in Tripp-Delmont School District 33-5.
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.
No town hall: the county runs things
Clearfield Colony is unincorporated, so Charles Mix 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.
Clearfield Colony is in ZIP code 57330
ZIP codes where Clearfield Colony residents live, with the share of the town in each.
| ZIP | Post office name | Share of Clearfield Colony | ZIP’s residents in Clearfield Colony |
|---|---|---|---|
| 57330 | Delmont, SD | 100% | 21% |
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 Clearfield Colony
Who supplies Clearfield Colony’s drinking water, and has it had violations?
The Clearfield Colony water system (EPA ID SD4602020). It reported no health-based violations to EPA in the five years to October 2026; 77% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan–Dec 2025), against a 15 ppb action level.
Who provides electricity in Clearfield Colony?
NorthWestern Energy (NorthWestern Energy - (SD)), an investor-owned utility. Its homes paid about 13.3¢ per kWh in 2025 (EIA).
What internet providers serve Clearfield Colony?
Midstate Communications (FCC, as of December 2025).
What ZIP codes are in Clearfield Colony?
57330. Census 2020 ZIP Code Tabulation Areas.
What school district is Clearfield Colony in?
Tripp-Delmont School District 33-5.
How do I register to vote in Clearfield Colony?
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 Charles Mix 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.