Living in Sand Coulee, MT: what to set up and who to call
Sand Coulee has no town government of its own, so Cascade County runs its elections and most services, and its children attend Centerville Elementary School District. Sand Coulee Water Users District reported one health-based violation to EPA in the last five years: a groundwater treatment requirement (Groundwater Rule), beginning Jul 2023.
I’m new in town
What to set up in Sand Coulee, 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 Sand Coulee.
Power comes from NorthWestern Energy
NorthWestern Energy (NorthWestern Energy LLC - (MT)), an investor-owned utility, serves all of Sand Coulee. Its homes paid an average of 14.4¢ per kWh in 2025, about $102 a month (its average across Montana, for customers on its standard service). Montana lets you buy power from another supplier; 0% of NorthWestern Energy’s home customers do, and NorthWestern Energy still delivers it.
Start or move service: northwesternenergy.com · (888) 467-2669
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Sand Coulee Water Users District
Sand Coulee Water Users District supplies Sand Coulee: about 34% of residents live in its service area. About 66% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws ground water and serves 180 people in all.
1 health-based violation reported to EPA in the five years to October 2026: a groundwater treatment requirement (Groundwater Rule), beginning Jul 2023. 77% of the 15,074 systems serving 101–500 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2022–Dec 2024, was 3.0 ppb, below the 15 ppb action level that applied. That’s higher than 81% 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 (EPA’s estimate). Violations are counted by the start of their compliance period. MT0000325.
1 home internet providers serve Sand Coulee
100% of 96 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| 3 Rivers 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 Sand Coulee’s trash rules yet
Pickup rules, the dump and recycling in Sand Coulee.
Where your child goes to school
Public school districts and the school path by grade.
Sand Coulee is in two districts that split the grades: Centerville Elementary School District and Centerville High School District.
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
Sand Coulee is unincorporated, so Cascade County is the local government.
Election office: FVAP local election office directory, updated Feb 2024; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Sand Coulee is in ZIP code 59472
ZIP codes where Sand Coulee residents live, with the share of the town in each.
| ZIP | Post office name | Share of Sand Coulee | ZIP’s residents in Sand Coulee |
|---|---|---|---|
| 59472 | Sand Coulee, MT | 100% | 25% |
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 Sand Coulee
Who supplies Sand Coulee’s drinking water, and has it had violations?
Sand Coulee Water Users District (EPA ID MT0000325). It reported 1 health-based violation to EPA in the five years to October 2026: a groundwater treatment requirement (Groundwater Rule). 77% of systems its size had none. Its latest lead 90th percentile was 3.0 ppb (Jan 2022–Dec 2024), against a 15 ppb action level.
Who provides electricity in Sand Coulee?
NorthWestern Energy (NorthWestern Energy LLC - (MT)), an investor-owned utility. Its homes paid about 14.4¢ per kWh in 2025 (EIA).
What internet providers serve Sand Coulee?
3 Rivers Communications (FCC, as of December 2025).
What ZIP codes are in Sand Coulee?
59472. Census 2020 ZIP Code Tabulation Areas.
What school district is Sand Coulee in?
Centerville Elementary School District and Centerville High School District.
How do I register to vote in Sand Coulee?
Montana has no online registration; you can register in person up to and including Election Day or by mail (postmarked 30 days before). Elections here are run by the Cascade County Election Administrator. Check your registration at prodvoterportal.mt.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 Nov 18, 2024 (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.