Photo: Iulus Ascanius at English Wikipedia · Public domainLiving in Oconomowoc, WI: what to set up and who to call
Oconomowoc runs its own electric utility, Oconomowoc Utilities; its homes paid 14.2¢ per kWh in 2025. Oconomowoc Waterworks has a clean five-year EPA record, but its latest lead result, 6.8 ppb, was higher than 94% of similar systems’ (the action level is 15).
I’m new in town
What to set up in Oconomowoc, 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 Oconomowoc.
Power comes from Oconomowoc Utilities
Oconomowoc Utilities (Oconomowoc Utilities), a municipal utility, serves all of Oconomowoc. Its homes paid an average of 14.2¢ per kWh in 2025, about $96 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 Oconomowoc Waterworks
Oconomowoc Waterworks supplies Oconomowoc: about 95% of residents live in its service area. About 5% 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 15,805 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 83% of the 3,525 systems serving 10,001–50,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jun–Sep 2023, was 6.8 ppb, below the 15 ppb action level that applied. That’s higher than 94% 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. WI2680227.
7 home internet providers serve Oconomowoc
97% of 6,015 addresses can get 100/20 Mbps; 30% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 97% | 1,000/35 |
| AT&T | DSL, Fiber, Fixed wireless | 93% | 5,000/5,000 |
| Bertram Communications | Fixed wireless | 96% | 100/20 |
| T-Mobile | Fixed wireless | 54% | 100/20 |
| Verizon | Fixed wireless | 49% | 25/6 |
| Bug Tussel | Fixed wireless | 20% | 50/8 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
Trash day in Oconomowoc depends on your street
Pickup days, the drop-off and recycling in Oconomowoc, from the town’s own site.
Your pickup week
- TrashEvery week, on your street’s dayLook up your day on oconomowoc-wi.gov
From oconomowoc-wi.gov, the town’s official site, checked Oct 21, 2026; pages dated 2026, October 14, 2022. 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.
Oconomowoc is in Oconomowoc Area School District.
ASchool 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.
Oconomowoc is in ZIP code 53066
ZIP codes where Oconomowoc residents live, with the share of the town in each.
| ZIP | Post office name | Share of Oconomowoc | ZIP’s residents in Oconomowoc |
|---|---|---|---|
| 53066 | Oconomowoc, WI | 100% | 50% |
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 Oconomowoc
Who supplies Oconomowoc’s drinking water, and has it had violations?
Oconomowoc Waterworks (EPA ID WI2680227). It reported no health-based violations to EPA in the five years to October 2026; 83% of systems its size had none. Its latest lead 90th percentile was 6.8 ppb (Jun–Sep 2023), against a 15 ppb action level.
Who provides electricity in Oconomowoc?
Oconomowoc Utilities (Oconomowoc Utilities), a municipal utility. Its homes paid about 14.2¢ per kWh in 2025 (EIA).
What internet providers serve Oconomowoc?
Spectrum, AT&T, Bertram Communications, T-Mobile, Verizon, Bug Tussel (FCC, as of December 2025).
What ZIP codes are in Oconomowoc?
53066. Census 2020 ZIP Code Tabulation Areas.
What school district is Oconomowoc in?
Oconomowoc Area School District.
How do I register to vote in Oconomowoc?
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 City of Oconomowoc 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: Oconomowoc’s own website (oconomowoc-wi.gov), read Oct 21, 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.