Photo: Downspec · CC BY-SA 4.0Living in Delavan, WI: what to set up and who to call
Delavan Waterworks has a clean five-year EPA record, but its latest lead result, 10.0 ppb, was higher than 98% of similar systems’ (the action level is 15). To register to vote, go to the City of Delavan Clerk: Delavan runs its own elections.
I’m new in town
What to set up in Delavan, 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 Delavan.
Power comes from Wisconsin Power & Light
Wisconsin Power & Light (Wisconsin Power & Light Co), an investor-owned utility, serves all of Delavan. 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 Delavan Waterworks
Delavan Waterworks supplies almost all of Delavan. It draws ground water and serves 9,028 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 2023, was 10.0 ppb, below the 15 ppb action level that applied. That’s higher than 98% 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. WI2650113.
7 home internet providers serve Delavan
97% of 2,392 addresses can get 100/20 Mbps; 0% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 96% | 1,000/35 |
| AT&T | DSL, Fixed wireless | 74% | 100/20 |
| Verizon | Fixed wireless | 94% | 300/20 |
| Rise Broadband | Fixed wireless | 37% | 25/5 |
| Bug Tussel | Fixed wireless | 20% | 50/8 |
| T-Mobile | Fixed wireless | 12% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Delavan’s trash rules yet
Pickup rules, the dump and recycling in Delavan.
Where your child goes to school
Public school districts and the school path by grade.
Delavan is in Delavan-Darien School District.
CSchool 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.
Delavan is in ZIP code 53115
ZIP codes where Delavan residents live, with the share of the town in each.
| ZIP | Post office name | Share of Delavan | ZIP’s residents in Delavan |
|---|---|---|---|
| 53115 | Delavan, WI | 100% | 54% |
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 Delavan
Who supplies Delavan’s drinking water, and has it had violations?
Delavan Waterworks (EPA ID WI2650113). 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 10.0 ppb (Jun–Sep 2023), against a 15 ppb action level.
Who provides electricity in Delavan?
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 Delavan?
Spectrum, AT&T, Verizon, Rise Broadband, Bug Tussel, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Delavan?
53115. Census 2020 ZIP Code Tabulation Areas.
What school district is Delavan in?
Delavan-Darien School District.
How do I register to vote in Delavan?
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 Delavan 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.