Photo: Nyttend · Public domainLiving in Deerfield Township, OH: what to set up and who to call
Deerfield Township spans 5 ZIP codes; 45040 holds the most residents (57%). For home internet, most of Deerfield Township can choose between Spectrum and altafiber Extended Territories.
I’m new in town
What to set up in Deerfield Township, 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 Deerfield Township.
Power comes from Duke Energy
Duke Energy (Duke Energy Ohio, Inc.), an investor-owned utility, serves all of Deerfield Township. 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 Warren Co. Socialville PWS
Warren Co. Socialville PWS supplies Deerfield Township: about 43% of residents live in its service area. Warren County serves another 36%. Butler Co. Water District 2 PWS serves another 5%. About 18% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It buys treated surface water (EPA lists Greater Cincinnati Water Works (GCWW) as seller) and serves 13,216 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 2025–Dec 2027, was 1.2 ppb, below the 15 ppb action level that applied. The highest in five years was 3.5 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. Violations are counted by the start of their compliance period. OH8304203.
7 home internet providers serve Deerfield Township
99% of 11,814 addresses can get 100/20 Mbps; 88% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 98% | 1,000/1,000 |
| altafiber Extended Territories | Fiber, DSL | 63% | 3,000/3,000 |
| altafiber | Fiber, DSL | 31% | 3,000/3,000 |
| Brightspeed | DSL | 24% | 40/3 |
| T-Mobile | Fixed wireless | 92% | 100/20 |
| Verizon | Fixed wireless | 83% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Deerfield Township’s trash rules yet
Pickup rules, the dump and recycling in Deerfield Township.
Where your child goes to school
Public school districts and the school path by grade.
Most of Deerfield Township (50%) is in Mason City School District; parts are in Kings Local School District (48%) and Princeton City School District (2%).
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 Aug 2020; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Deerfield Township spans 5 ZIP codes
ZIP codes where Deerfield Township residents live, with the share of the town in each.
| ZIP | Post office name | Share of Deerfield Township | ZIP’s residents in Deerfield Township |
|---|---|---|---|
| 45040 | Mason, OH | 57% | 40% |
| 45039 | Maineville, OH | 21% | 30% |
| 45140 | Loveland, OH | 19% | 14% |
| 45034 | Kings Mills, OH | 2% | 69% |
| 45249 | Cincinnati, OH | 2% | 4% |
A few homes fall in 45241.
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 Deerfield Township
Who supplies Deerfield Township’s drinking water, and has it had violations?
Warren Co. Socialville PWS (EPA ID OH8304203). 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 1.2 ppb (Jan 2025–Dec 2027), against a 15 ppb action level.
Who provides electricity in Deerfield Township?
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 Deerfield Township?
Spectrum, altafiber Extended Territories, altafiber, Brightspeed, T-Mobile, Verizon (FCC, as of December 2025).
What ZIP codes are in Deerfield Township?
45040 (57%), 45039 (21%), 45140 (19%), 45034 (2%), 45249 (2%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Deerfield Township in?
Mason City School District. Parts of the city are in Kings Local School District and Princeton City School District.
How do I register to vote in Deerfield Township?
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, Warren 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.