Living in Plainville, OH: what to set up and who to call
Plainville has no town government of its own, so Hamilton County runs its elections and most services, and its children attend Mariemont City School District. For emergencies, Plainville is closest to Mercy Health-Anderson Hospital, 4.1 miles away.
I’m new in town
What to set up in Plainville, 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 Plainville.
Power comes from Duke Energy
Duke Energy (Duke Energy Ohio, Inc.), an investor-owned utility, serves all of Plainville. Its homes paid an average of 16.8¢ per kWh in 2025, about $154 a month (its average across Ohio, for customers on its standard service). Ohio lets you buy power from another supplier; 60% of Duke Energy’s home customers do, and Duke Energy still delivers it.
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Greater Cincinnati Water Works (GCWW)
Greater Cincinnati Water Works (GCWW) supplies almost all of Plainville. It draws surface water and serves 750,200 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 93% of the 42 systems serving 500,001–1,000,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Jun 2026, was 2.1 ppb, below the 15 ppb action level that applied. The highest in five years was 7.7 ppb. That’s higher than 59% 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. Violations are counted by the start of their compliance period. OH3102612.
5 home internet providers serve Plainville
97% of 79 addresses can get 100/20 Mbps; 93% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable | 94% | 1,000/1,000 |
| altafiber | Fiber | 94% | 3,000/3,000 |
| T-Mobile | Fixed wireless | 29% | 25/3 |
| AT&T | Fixed wireless | 6% | 25/3 |
| Verizon | Fixed wireless | 6% | 25/6 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Plainville’s trash rules yet
Pickup rules, the dump and recycling in Plainville.
Where your child goes to school
Public school districts and the school path by grade.
Plainville is in Mariemont City 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.
No town hall: the county runs things
Plainville is unincorporated, so Hamilton County is the local government.
Election office: FVAP local election office directory, updated May 2026; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Plainville spans 2 ZIP codes
ZIP codes where Plainville residents live, with the share of the town in each.
| ZIP | Post office name | Share of Plainville | ZIP’s residents in Plainville |
|---|---|---|---|
| 45227 | Cincinnati, OH | 58% | 0% |
| 45243 | Cincinnati, OH | 42% | 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 Plainville
Who supplies Plainville’s drinking water, and has it had violations?
Greater Cincinnati Water Works (GCWW) (EPA ID OH3102612). It reported no health-based violations to EPA in the five years to October 2026; 93% of systems its size had none. Its latest lead 90th percentile was 2.1 ppb (Jan–Jun 2026), against a 15 ppb action level.
Who provides electricity in Plainville?
Duke Energy (Duke Energy Ohio, Inc.), an investor-owned utility. Its homes paid about 16.8¢ per kWh in 2025 (EIA).
What internet providers serve Plainville?
Spectrum, altafiber, T-Mobile, AT&T, Verizon (FCC, as of December 2025).
What ZIP codes are in Plainville?
45227 (58%), 45243 (42%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Plainville in?
Mariemont City School District.
How do I register to vote in Plainville?
In Ohio you can register online until 30 days before Election Day, in person until 30 days before Election Day, or by mail (postmarked 30 days before). Elections here are run by the Director, Hamilton County Board of Elections. Check your registration at voterlookup.ohiosos.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 Aug 3, 2026 (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.