Photo: Andrew Filer from Seattle (ex-Minneapolis) · CC BY-SA 2.0Living in St. Thomas, ND: what to set up and who to call
All of St. Thomas gets its mail under one ZIP code, 58276. Unity Medical Center, 14.4 miles away, is the nearest emergency room.
I’m new in town
What to set up in St. Thomas, 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 St. Thomas.
Power comes from Otter Tail Power
Otter Tail Power (Otter Tail Power Co), an investor-owned utility, serves all of St. Thomas. Its homes paid an average of 11.1¢ per kWh in 2025, about $120 a month (its average across North Dakota).
Start or move service: ottertail.com · (866) 410-8780
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from City of St Thomas water system
The City of St Thomas water system supplies St. Thomas: 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 buys treated ground water (EPA lists Northeast Rwd- North Valley Branch as seller) and serves 331 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 2023–Dec 2025, was 0.0 ppb, below the 15 ppb action level that applied. The highest in five years was 1.6 ppb. 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 (EPA’s estimate). Violations are counted by the start of their compliance period. ND3400856.
1 home internet providers serve St. Thomas
100% of 191 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Polar Telecommunications | 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 St. Thomas’ trash rules yet
Pickup rules, the dump and recycling in St. Thomas.
Where your child goes to school
Public school districts and the school path by grade.
St. Thomas is in Grafton Public School District 18.
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.
Town hall and registering to vote
Who to call, and how to register.
Election office: FVAP local election office directory, updated Sep 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Jul 30, 2024.
St. Thomas is in ZIP code 58276
ZIP codes where St. Thomas residents live, with the share of the town in each.
| ZIP | Post office name | Share of St. Thomas | ZIP’s residents in St. Thomas |
|---|---|---|---|
| 58276 | Saint Thomas, ND | 100% | 67% |
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 St. Thomas
Who supplies St. Thomas’ drinking water, and has it had violations?
The City of St Thomas water system (EPA ID ND3400856). 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 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in St. Thomas?
Otter Tail Power (Otter Tail Power Co), an investor-owned utility. Its homes paid about 11.1¢ per kWh in 2025 (EIA).
What internet providers serve St. Thomas?
Polar Telecommunications (FCC, as of December 2025).
What ZIP codes are in St. Thomas?
58276. Census 2020 ZIP Code Tabulation Areas.
What school district is St. Thomas in?
Grafton Public School District 18.
How do I register to vote in St. Thomas?
North Dakota has no voter registration: you show ID at the polls. Elections here are run by the Pembina County Auditor. Check your registration at vip.sos.nd.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 Jul 30, 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.