Photo: Corey Coyle · CC BY 3.0Living in Delafield, WI: what to set up and who to call
New voters sign up with the Town of Delafield Clerk, which runs Delafield’s elections. Two school districts split the grades in Delafield: Arrowhead Union High School District and Kettle Moraine School District.
I’m new in town
What to set up in Delafield, 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 Delafield.
Power comes from We Energies
We Energies (Wisconsin Electric Power Co.), an investor-owned utility, serves all of Delafield. 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 Hartland Waterworks
Hartland Waterworks supplies Delafield: about 20% of residents live in its service area. About 80% 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 9,212 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 Jul–Dec 2025, was 4.2 ppb, below the 15 ppb action level that applied. The highest in five years was 10.0 ppb. That’s higher than 89% 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. WI2680205.
7 home internet providers serve Delafield
99% of 3,081 addresses can get 100/20 Mbps; 2% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 99% | 1,000/35 |
| AT&T | DSL, Fixed wireless, Fiber | 55% | 100/20 |
| Brightspeed | DSL, Fixed wireless | 22% | 80/10 |
| T-Mobile | Fixed wireless | 76% | 100/20 |
| Verizon | Fixed wireless | 66% | 300/20 |
| Bertram Communications | Fixed wireless | 28% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
Advance Disposal picks up trash in Delafield
Pickup days, the drop-off and recycling in Delafield, from the town’s own site.
We couldn’t find pickup days or drop-off hours. Check cityofdelafieldwi.gov →
From cityofdelafieldwi.gov, the town’s official site, checked Oct 22, 2026. 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.
Delafield is in two districts that split the grades: Arrowhead Union High School District and Kettle Moraine School District.
Test scores and every school: see 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.
Delafield spans 6 ZIP codes
ZIP codes where Delafield residents live, with the share of the town in each.
| ZIP | Post office name | Share of Delafield | ZIP’s residents in Delafield |
|---|---|---|---|
| 53072 | Pewaukee, WI | 56% | 17% |
| 53018 | Delafield, WI | 24% | 26% |
| 53188 | Waukesha, WI | 16% | 4% |
| 53029 | Hartland, WI | 2% | 1% |
| 53183 | Wales, WI | 1% | 3% |
| 53066 | Oconomowoc, WI | 1% | 0% |
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 Delafield
Who supplies Delafield’s drinking water, and has it had violations?
Hartland Waterworks (EPA ID WI2680205). 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 4.2 ppb (Jul–Dec 2025), against a 15 ppb action level.
Who provides electricity in Delafield?
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 Delafield?
Spectrum, AT&T, Brightspeed, T-Mobile, Verizon, Bertram Communications (FCC, as of December 2025).
What ZIP codes are in Delafield?
53072 (56%), 53018 (24%), 53188 (16%), 53029 (2%), 53183 (1%), 53066 (1%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Delafield in?
Arrowhead Union High School District and Kettle Moraine School District. Parts of the city are in Hartland-Lakeside Joint No. 3 School District and Waukesha School District.
How do I register to vote in Delafield?
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 Delafield 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: Delafield’s own website (cityofdelafieldwi.gov), 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.