Photo: Eric Wood · CC BY-SA 3.0Living in Plainfield, IN: what to set up and who to call
Most mail in Plainfield goes to 46168 (90% of residents), one of 3 ZIP codes in town. Plainfield-Guilford Township Public Library, at 1120 Stafford Road, is the library in town.
I’m new in town
What to set up in Plainfield, 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 Plainfield.
Power comes from Duke Energy
Duke Energy (Duke Energy Indiana, LLC), an investor-owned utility, serves 90.2% of Plainfield residents. Its homes paid an average of 15.0¢ per kWh in 2025, about $149 a month (its average across Indiana).
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Plainfield Water Works
Plainfield Water Works supplies Plainfield: about 82% of residents live in its service area. Citizens Energy Group serves another 10%. About 8% 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 34,477 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 Jan 2024–Dec 2026, was 1.1 ppb, below the 15 ppb action level that applied. The highest in five years was 1.7 ppb. That’s higher than 51% 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. IN5232020.
7 home internet providers serve Plainfield
98% of 11,067 addresses can get 100/20 Mbps; 57% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| AT&T | DSL, Fiber, Fixed wireless | 94% | 5,000/5,000 |
| Xfinity | Cable, Fiber | 59% | 2,000/250 |
| Spectrum | Cable, Fiber | 54% | 1,000/1,000 |
| Verizon | Fixed wireless | 76% | 300/20 |
| T-Mobile | Fixed wireless | 58% | 100/20 |
| On-Ramp Indiana | Fixed wireless | 20% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Plainfield’s trash rules yet
Pickup rules, the dump and recycling in Plainfield.
Where your child goes to school
Public school districts and the school path by grade.
Most of Plainfield (83%) is in Plainfield Community School Corporation; parts are in Avon Community School Corporation (16%).
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 2023; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Plainfield spans 3 ZIP codes
ZIP codes where Plainfield residents live, with the share of the town in each.
| ZIP | Post office name | Share of Plainfield | ZIP’s residents in Plainfield |
|---|---|---|---|
| 46168 | Plainfield, IN | 90% | 83% |
| 46231 | Indianapolis, IN | 9% | 27% |
| 46123 | Avon, IN | 2% | 1% |
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 Plainfield
Who supplies Plainfield’s drinking water, and has it had violations?
Plainfield Water Works (EPA ID IN5232020). 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 1.1 ppb (Jan 2024–Dec 2026), against a 15 ppb action level.
Who provides electricity in Plainfield?
Duke Energy (Duke Energy Indiana, LLC), an investor-owned utility. Its homes paid about 15.0¢ per kWh in 2025 (EIA).
What internet providers serve Plainfield?
AT&T, Xfinity, Spectrum, Verizon, T-Mobile, On-Ramp Indiana (FCC, as of December 2025).
What ZIP codes are in Plainfield?
46168 (90%), 46231 (9%), 46123 (2%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Plainfield in?
Plainfield Community School Corporation. Parts of the city are in Avon Community School Corporation.
How do I register to vote in Plainfield?
In Indiana you can register online until 29 days before Election Day, in person until 29 days before Election Day, or by mail (postmarked 29 days before). Elections here are run by the Hendricks County Voter Registration Office. Check your registration at indianavoters.in.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.