Photo: Royalbroil · CC BY-SA 3.0Living in Theresa, WI: what to set up and who to call
Theresa Waterworks reported one health-based violation to EPA in the last five years: a disinfection byproducts requirement (Stage 1 Disinfectants and Disinfection Byproducts Rule), beginning Sep 2025. Elections in Theresa are run by Theresa itself; register with the Village of Theresa Clerk.
I’m new in town
What to set up in Theresa, 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 Theresa.
Power comes from We Energies
We Energies (Wisconsin Electric Power Co.), an investor-owned utility, serves all of Theresa. 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 Theresa Waterworks
Theresa Waterworks supplies almost all of Theresa. It draws ground water and serves 1,262 people in all.
1 health-based violation reported to EPA in the five years to October 2026: a disinfection byproducts requirement (Stage 1 Disinfectants and Disinfection Byproducts Rule), beginning Sep 2025. 78% of the 7,966 systems serving 1,001–3,300 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jun–Sep 2023, was 0.7 ppb, below the 15 ppb action level that applied. That’s lower than 57% 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. WI1140154.
5 home internet providers serve Theresa
97% of 651 addresses can get 100/20 Mbps; 0% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable | 98% | 1,000/1,000 |
| Frontier | DSL | 78% | 70/3 |
| Bertram Communications | Fixed wireless | 99% | 100/20 |
| Bug Tussel | Fixed wireless | 37% | 50/8 |
| Verizon | Fixed wireless | 30% | 25/6 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
Trash and recycling in Theresa
Pickup days, the drop-off and recycling in Theresa, from the town’s own site.
Brush/Yard Waste Dumpsite (River's Edge Park)
We couldn’t find its opening hours.
From villageoftheresa.com, the town’s official site, checked Oct 22, 2026; pages dated 2026-10-13. Rules change: the town’s page is the last word. .
Where your child goes to school
Public school districts and the school path by grade.
Theresa is in Lomira School District.
B−School 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.
Theresa is in ZIP code 53091
ZIP codes where Theresa residents live, with the share of the town in each.
| ZIP | Post office name | Share of Theresa | ZIP’s residents in Theresa |
|---|---|---|---|
| 53091 | Theresa, WI | 100% | 62% |
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 Theresa
Who supplies Theresa’s drinking water, and has it had violations?
Theresa Waterworks (EPA ID WI1140154). It reported 1 health-based violation to EPA in the five years to October 2026: a disinfection byproducts requirement (Stage 1 Disinfectants and Disinfection Byproducts Rule). 78% of systems its size had none. Its latest lead 90th percentile was 0.7 ppb (Jun–Sep 2023), against a 15 ppb action level.
Who provides electricity in Theresa?
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 Theresa?
Spectrum, Frontier, Bertram Communications, Bug Tussel, Verizon (FCC, as of December 2025).
What ZIP codes are in Theresa?
53091. Census 2020 ZIP Code Tabulation Areas.
What school district is Theresa in?
Lomira School District.
How do I register to vote in Theresa?
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 Village of Theresa 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: Theresa’s own website (villageoftheresa.com), read Oct 22, 2026, pickup and drop-off facts extracted and checked against the page they came from.
- 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.