Aztalan · Photo: Joshua Mayer - Flickr user wackybadger · CC BY-SA 2.0Living in Aztalan, WI: what to set up and who to call
Lake Mills Waterworks reported one health-based violation to EPA in the last five years: a lead and copper treatment requirement (Lead and Copper Rule), beginning Sep 2022. Aztalan runs its own elections, so the Town of Aztalan Clerk, not a county office, keeps the voter rolls.
I’m new in town
What to set up in Aztalan, 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 Aztalan.
Power comes from We Energies
We Energies (Wisconsin Electric Power Co.), an investor-owned utility, serves all of Aztalan. Its homes paid an average of 20.5¢ per kWh in 2025, about $131 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 Lake Mills Waterworks
Lake Mills Waterworks supplies Aztalan: about 12% of residents live in its service area. About 82% 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 6,211 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), beginning Sep 2022. 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 2025, was 4.6 ppb, below the 15 ppb action level that applied. The highest in five years was 7.1 ppb. That’s higher than 90% 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. WI1280108.
11 home internet providers serve Aztalan
85% of 609 addresses can get 100/20 Mbps; 48% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 74% | 1,000/1,000 |
| Bug Tussel | Fixed wireless, Fiber | 49% | 1,000/1,000 |
| TDS Telecom | DSL, Fiber | 24% | 1,000/1,000 |
| Frontier | DSL | 8% | 10/1 |
| Bertram Communications | Fixed wireless | 97% | 100/20 |
| T-Mobile | Fixed wireless | 57% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Aztalan’s trash rules yet
Pickup rules, the dump and recycling in Aztalan.
Where your child goes to school
Public school districts and the school path by grade.
Most of Aztalan (52%) is in Jefferson School District; parts are in Lake Mills Area School District (34%) and Johnson Creek School District (14%).
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 Jun 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Aztalan spans 3 ZIP codes
ZIP codes where Aztalan residents live, with the share of the town in each.
| ZIP | Post office name | Share of Aztalan | ZIP’s residents in Aztalan |
|---|---|---|---|
| 53549 | Jefferson, WI | 39% | 5% |
| 53551 | Lake Mills, WI | 30% | 5% |
| 53038 | Johnson Creek, WI | 30% | 10% |
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 Aztalan
Who supplies Aztalan’s drinking water, and has it had violations?
Lake Mills Waterworks (EPA ID WI1280108). 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). 80% of systems its size had none. Its latest lead 90th percentile was 4.6 ppb (Jun–Sep 2025), against a 15 ppb action level.
Who provides electricity in Aztalan?
We Energies (Wisconsin Electric Power Co.), an investor-owned utility. Its homes paid about 20.5¢ per kWh in 2025 (EIA).
What internet providers serve Aztalan?
Spectrum, Bug Tussel, TDS Telecom, Frontier, Bertram Communications, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Aztalan?
53549 (39%), 53551 (30%), 53038 (30%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Aztalan in?
Jefferson School District. Parts of the city are in Lake Mills Area School District and Johnson Creek School District.
How do I register to vote in Aztalan?
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 Aztalan 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.