Living in Gibson Flats, MT: what to set up and who to call
Gibson Flats has no town government of its own, so Cascade County runs its elections and most services, and its children attend Great Falls Elementary School District. The City of Great Falls water system has a clean five-year EPA record, but its latest lead result, 12.0 ppb, was higher than 99% of similar systems’ (the action level is 15).
I’m new in town
What to set up in Gibson Flats, 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 Gibson Flats.
Power comes from NorthWestern Energy
NorthWestern Energy (NorthWestern Energy LLC - (MT)), an investor-owned utility, serves all of Gibson Flats. 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 City of Great Falls water system
The City of Great Falls water system supplies Gibson Flats: about 0% of residents live in its service area. About 100% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws surface water and serves 60,000 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 90% of the 597 systems serving 50,001–100,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Jun 2026, was 12.0 ppb, below the 15 ppb action level that applied. That’s higher than 99% 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. MT0000525.
Which providers serve Gibson Flats
This card will list the home internet providers the FCC’s National Broadband Map shows in Gibson Flats, the share of addresses that can get 100/20 Mbps and the share with fiber, with the map’s “as of” date.
Source to come: FCC Broadband Data Collection.
We don’t have Gibson Flats’ trash rules yet
Pickup rules, the dump and recycling in Gibson Flats.
Where your child goes to school
Public school districts and the school path by grade.
Gibson Flats is in two districts that split the grades: Great Falls Elementary School District and Great Falls 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
Gibson Flats 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.
Gibson Flats is in ZIP code 59405
ZIP codes where Gibson Flats residents live, with the share of the town in each.
| ZIP | Post office name | Share of Gibson Flats | ZIP’s residents in Gibson Flats |
|---|---|---|---|
| 59405 | Great Falls, MT | 100% | 1% |
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 Gibson Flats
Who supplies Gibson Flats’ drinking water, and has it had violations?
The City of Great Falls water system (EPA ID MT0000525). It reported no health-based violations to EPA in the five years to October 2026; 90% of systems its size had none. Its latest lead 90th percentile was 12.0 ppb (Jan–Jun 2026), against a 15 ppb action level.
Who provides electricity in Gibson Flats?
NorthWestern Energy (NorthWestern Energy LLC - (MT)), an investor-owned utility. Its homes paid about 14.4¢ per kWh in 2025 (EIA).
What ZIP codes are in Gibson Flats?
59405. Census 2020 ZIP Code Tabulation Areas.
What school district is Gibson Flats in?
Great Falls Elementary School District and Great Falls High School District.
How do I register to vote in Gibson Flats?
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): pending.