Photo: USGS · Public domainLiving in Sweet Grass, MT: what to set up and who to call
Sweet Grass has no town government of its own, so Toole County runs its elections and most services, and its children attend Sunburst K-12 Schools. Sweetgrass Water Users Assn reported one health-based violation to EPA in the last five years: disinfection byproducts (TTHM), beginning Jul 2025.
I’m new in town
What to set up in Sweet Grass, 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 Sweet Grass.
Power comes from Marias River Electric Coop
Marias River Electric Coop (Marias River Electric Coop Inc), a cooperative utility, serves all of Sweet Grass.
Start or move service: mariasriverec.com · (406) 434-5575
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Sweetgrass Water Users Assn
Sweetgrass Water Users Assn supplies Sweet Grass: about 89% of residents live in its service area. About 11% 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 Bogus Coutts, Ab - Mtcanda1 as seller) and serves 100 people in all.
1 health-based violation reported to EPA in the five years to October 2026: disinfection byproducts (TTHM), beginning Jul 2025. 78% of the 11,392 systems serving <=100 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2016–Dec 2018, was 15.0 ppb, below the 15 ppb action level that applied. It’s from 2018: EPA has no newer result for this system.
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. MT0000340.
1 home internet providers serve Sweet Grass
0% of 86 addresses can get 100/20 Mbps; 78% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Northern Telephone | Fiber | 79% | 50/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Sweet Grass’ trash rules yet
Pickup rules, the dump and recycling in Sweet Grass.
Where your child goes to school
Public school districts and the school path by grade.
Sweet Grass is in Sunburst K-12 Schools.
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
Sweet Grass is unincorporated, so Toole County is the local government.
Election office: FVAP local election office directory, updated Aug 2015; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Sweet Grass is in ZIP code 59484
ZIP codes where Sweet Grass residents live, with the share of the town in each.
| ZIP | Post office name | Share of Sweet Grass | ZIP’s residents in Sweet Grass |
|---|---|---|---|
| 59484 | Sweet Grass, MT | 100% | 33% |
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 Sweet Grass
Who supplies Sweet Grass’ drinking water, and has it had violations?
Sweetgrass Water Users Assn (EPA ID MT0000340). It reported 1 health-based violation to EPA in the five years to October 2026: disinfection byproducts (TTHM). 78% of systems its size had none. Its latest lead 90th percentile was 15.0 ppb (Jan 2016–Dec 2018), against a 15 ppb action level.
Who provides electricity in Sweet Grass?
Marias River Electric Coop (Marias River Electric Coop Inc), a cooperative utility.
What internet providers serve Sweet Grass?
Northern Telephone (FCC, as of December 2025).
What ZIP codes are in Sweet Grass?
59484. Census 2020 ZIP Code Tabulation Areas.
What school district is Sweet Grass in?
Sunburst K-12 Schools.
How do I register to vote in Sweet Grass?
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 Toole 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.