Living in Sun Prairie, WI: what to set up and who to call
Cottage Grove Waterworks reported one health-based violation to EPA in the last five years: a lead and copper treatment requirement (Lead and Copper Rule Revisions), beginning Oct 2024. Sun Prairie runs its own elections, so the Town of Sun Prairie Clerk, not a county office, keeps the voter rolls.
I’m new in town
What to set up in Sun Prairie, 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 Sun Prairie.
Power comes from Wisconsin Power & Light
Wisconsin Power & Light (Wisconsin Power & Light Co), an investor-owned utility, serves all of Sun Prairie. 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 Cottage Grove Waterworks
Cottage Grove Waterworks supplies Sun Prairie: about 2% of residents live in its service area. About 98% 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 9,345 people in all.
1 health-based violation reported to EPA in the five years to October 2026: a lead and copper treatment requirement (Lead and Copper Rule Revisions), beginning Oct 2024. 80% of the 5,012 systems serving 3,301–10,000 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jun–Sep 2023, was 2.3 ppb, below the 15 ppb action level that applied. That’s higher than 75% 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. WI1130218.
9 home internet providers serve Sun Prairie
94% of 979 addresses can get 100/20 Mbps; 64% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 81% | 1,000/1,000 |
| UpNetWI | Fixed wireless, Fiber | 45% | 1,000/400 |
| Frontier | DSL, Fiber | 43% | 10/1 |
| TDS Telecom | Fiber | 35% | 8,000/8,000 |
| LiteWire | Fixed wireless | 88% | 100/25 |
| Verizon | Fixed wireless | 81% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
The nearest public drop-off is 2 miles away
Pickup rules, the dump and recycling in Sun Prairie.
Sun Prairie Recycling Center
This isn’t Sun Prairie’s own facility. Whether Sun Prairie residents may use it is the town’s rule: check the town’s office.
OpenStreetMap, as of Oct 9, 2026. © OpenStreetMap contributors.
Where your child goes to school
Public school districts and the school path by grade.
Most of Sun Prairie (78%) is in Sun Prairie Area School District; parts are in Marshall School District (21%).
BSchool gradeSee 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 May 2026; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Sun Prairie spans 4 ZIP codes
ZIP codes where Sun Prairie residents live, with the share of the town in each.
| ZIP | Post office name | Share of Sun Prairie | ZIP’s residents in Sun Prairie |
|---|---|---|---|
| 53590 | Sun Prairie, WI | 62% | 3% |
| 53559 | Marshall, WI | 22% | 8% |
| 53527 | Cottage Grove, WI | 15% | 3% |
| 53531 | Deerfield, WI | 2% | 1% |
53596 is P.O. box or single-organization ZIP with no homes.
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 Sun Prairie
Who supplies Sun Prairie’s drinking water, and has it had violations?
Cottage Grove Waterworks (EPA ID WI1130218). It reported 1 health-based violation to EPA in the five years to October 2026: a lead and copper treatment requirement (Lead and Copper Rule Revisions). 80% of systems its size had none. Its latest lead 90th percentile was 2.3 ppb (Jun–Sep 2023), against a 15 ppb action level.
Who provides electricity in Sun Prairie?
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 Sun Prairie?
Spectrum, UpNetWI, Frontier, TDS Telecom, LiteWire, Verizon (FCC, as of December 2025).
What ZIP codes are in Sun Prairie?
53590 (62%), 53559 (22%), 53527 (15%), 53531 (2%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Sun Prairie in?
Sun Prairie Area School District. Parts of the city are in Marshall School District.
How do I register to vote in Sun Prairie?
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 Sun Prairie 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.