Living in Colfax, WI: what to set up and who to call
Power in Colfax comes from Dunn County Electric Coop, a cooperative utility rather than a private company. To register to vote, go to the Town of Colfax Clerk: Colfax runs its own elections.
I’m new in town
What to set up in Colfax, 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 Colfax.
Power comes from Dunn County Electric Coop
Dunn County Electric Coop (Dunn County Electric Coop), a cooperative utility, serves all of Colfax. Its homes paid an average of 16.2¢ per kWh in 2025, about $160 a month (its average across Wisconsin).
Start or move service: dairynet.com · (608) 788-4000
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Colfax Waterworks
Colfax Waterworks supplies Colfax: 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 ground water and serves 1,102 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 7,966 systems serving 1,001–3,300 people.
The latest lead result on file, the 90th percentile of homes sampled in Jun–Sep 2023, was 0.0 ppb, below the 15 ppb action level that applied. 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. WI6170261.
7 home internet providers serve Colfax
88% of 546 addresses can get 100/20 Mbps; 83% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Bloomer Telephone Company | Fiber | 66% | 2,500/2,500 |
| CenturyLink | DSL | 38% | 60/5 |
| 24-7 Telcom | Fiber | 16% | 1,000/1,000 |
| Spectrum | Cable | 6% | 1,000/35 |
| Verizon | Fixed wireless | 27% | 300/20 |
| T-Mobile | Fixed wireless | 25% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Colfax’s trash rules yet
Pickup rules, the dump and recycling in Colfax.
Where your child goes to school
Public school districts and the school path by grade.
Most of Colfax (97%) is in Colfax School District; parts are in Elk Mound Area School District (3%).
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 Jun 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Colfax spans 2 ZIP codes
ZIP codes where Colfax residents live, with the share of the town in each.
| ZIP | Post office name | Share of Colfax | ZIP’s residents in Colfax |
|---|---|---|---|
| 54730 | Colfax, WI | 97% | 24% |
| 54739 | Elk Mound, WI | 3% | 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 Colfax
Who supplies Colfax’s drinking water, and has it had violations?
Colfax Waterworks (EPA ID WI6170261). 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 0.0 ppb (Jun–Sep 2023), against a 15 ppb action level.
Who provides electricity in Colfax?
Dunn County Electric Coop (Dunn County Electric Coop), a cooperative utility. Its homes paid about 16.2¢ per kWh in 2025 (EIA).
What internet providers serve Colfax?
Bloomer Telephone Company, CenturyLink, 24-7 Telcom, Spectrum, Verizon, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Colfax?
54730 (97%), 54739 (3%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Colfax in?
Colfax School District. Parts of the city are in Elk Mound Area School District.
How do I register to vote in Colfax?
In Wisconsin you can register online until 20 days before Election Day, in person up to and including Election Day, or by mail (postmarked 20 days before). Elections here are run by the Town of Colfax Clerk. Check your registration at myvote.wi.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.