Photo: Andrew Filer from Seattle (ex-Minneapolis) · CC BY-SA 2.0Living in Coleharbor, ND: what to set up and who to call
Every home in Coleharbor is in ZIP code 58531. For emergencies, Coleharbor is closest to Garrison Memorial Hospital, 11.4 miles away.
I’m new in town
What to set up in Coleharbor, 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 Coleharbor.
Power comes from Otter Tail Power
Otter Tail Power (Otter Tail Power Co), an investor-owned utility, serves all of Coleharbor. 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 Coleharbor water system
The City of Coleharbor water system supplies Coleharbor: about 50% of residents live in its service area. About 50% 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 Mclean-Sheridan Water District-System 1 as seller) and serves 79 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 11,392 systems serving <=100 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2023–Dec 2025, was 3.6 ppb, below the 15 ppb action level that applied. The highest in five years was 4.1 ppb. That’s higher than 84% 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. ND2800194.
1 home internet providers serve Coleharbor
100% of 74 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| West River Telecommunications Cooperative | 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 Coleharbor’s trash rules yet
Pickup rules, the dump and recycling in Coleharbor.
Where your child goes to school
Public school districts and the school path by grade.
Coleharbor is in Underwood Public School District 8.
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 Oct 2022; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Jul 30, 2024.
Coleharbor is in ZIP code 58531
ZIP codes where Coleharbor residents live, with the share of the town in each.
| ZIP | Post office name | Share of Coleharbor | ZIP’s residents in Coleharbor |
|---|---|---|---|
| 58531 | Coleharbor, ND | 100% | 15% |
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 Coleharbor
Who supplies Coleharbor’s drinking water, and has it had violations?
The City of Coleharbor water system (EPA ID ND2800194). It reported no health-based violations to EPA in the five years to October 2026; 78% of systems its size had none. Its latest lead 90th percentile was 3.6 ppb (Jan 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in Coleharbor?
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 Coleharbor?
West River Telecommunications Cooperative (FCC, as of December 2025).
What ZIP codes are in Coleharbor?
58531. Census 2020 ZIP Code Tabulation Areas.
What school district is Coleharbor in?
Underwood Public School District 8.
How do I register to vote in Coleharbor?
North Dakota has no voter registration: you show ID at the polls. Elections here are run by the McLean 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.