Living in Greenfield, WI: what to set up and who to call
To register to vote, go to the Town of Greenfield Clerk: Greenfield runs its own elections. The closest ER is Tomah Memorial Hospital, 6.8 miles away.
I’m new in town
What to set up in Greenfield, 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 Greenfield.
Power comes from Wisconsin Power & Light
Wisconsin Power & Light (Wisconsin Power & Light Co), an investor-owned utility, serves 94.5% of Greenfield residents. Its homes paid an average of 18.5¢ per kWh in 2025, about $128 a month (its average across Wisconsin).
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Fort Mccoy North Post water system
The Fort Mccoy North Post water system supplies Greenfield: about 1% of residents live in its service area. About 99% 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 10,000 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 80% of the 5,012 systems serving 3,301–10,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jun–Sep 2021, was 1.7 ppb, below the 15 ppb action level that applied. It’s from 2021: 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. WI6420302.
6 home internet providers serve Greenfield
42% of 322 addresses can get 100/20 Mbps; 4% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Brightspeed | DSL, Fixed wireless | 56% | 100/10 |
| Spectrum | Cable | 37% | 1,000/35 |
| Lynxx Networks | Fiber | 4% | 1,000/1,000 |
| T-Mobile | Fixed wireless | 19% | 100/20 |
| Bug Tussel | Fixed wireless | 14% | 25/5 |
| Verizon | Fixed wireless | 12% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Greenfield’s trash rules yet
Pickup rules, the dump and recycling in Greenfield.
Where your child goes to school
Public school districts and the school path by grade.
Most of Greenfield (85%) is in Tomah Area School District; parts are in Sparta Area School District (15%).
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 Apr 2026; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Greenfield is in ZIP code 54660
ZIP codes where Greenfield residents live, with the share of the town in each.
| ZIP | Post office name | Share of Greenfield | ZIP’s residents in Greenfield |
|---|---|---|---|
| 54660 | Tomah, WI | 99% | 4% |
A few homes fall in 54656.
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 Greenfield
Who supplies Greenfield’s drinking water, and has it had violations?
The Fort Mccoy North Post water system (EPA ID WI6420302). It reported no health-based violations to EPA in the five years to October 2026; 80% of systems its size had none. Its latest lead 90th percentile was 1.7 ppb (Jun–Sep 2021), against a 15 ppb action level.
Who provides electricity in Greenfield?
Wisconsin Power & Light (Wisconsin Power & Light Co), an investor-owned utility. Its homes paid about 18.5¢ per kWh in 2025 (EIA).
What internet providers serve Greenfield?
Brightspeed, Spectrum, Lynxx Networks, T-Mobile, Bug Tussel, Verizon (FCC, as of December 2025).
What ZIP codes are in Greenfield?
54660. Census 2020 ZIP Code Tabulation Areas.
What school district is Greenfield in?
Tomah Area School District. Parts of the city are in Sparta Area School District.
How do I register to vote in Greenfield?
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 Greenfield 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.