Living in Keystone, FL: what to set up and who to call
Keystone has no town government of its own, so Hillsborough County runs its elections and most services, and its children attend Hillsborough County School District. Almost every address in Keystone can get fiber (94%, by the FCC’s map).
I’m new in town
What to set up in Keystone, 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 Keystone.
Power comes from Duke Energy
Duke Energy (Duke Energy Florida, LLC), an investor-owned utility, serves all of Keystone. Its homes paid an average of 18.4¢ per kWh in 2025, about $185 a month (its average across Florida).
Start or move service: progress-energy.com · (800) 700-8744
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Hcwrc/Northwest Utilities
Hcwrc/Northwest Utilities supplies Keystone: about 78% of residents live in its service area. Pcud-Pasco County Regional PWS serves another 7%. About 14% 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 City of Tampa Water Department and Tampa Bay Water Reg. Surface Water Plant and Tampa Bay Regional Groundwater Plant and Tampa Bay Water Morris Bridge Pump Stati and Tampa Bay Wellfields for Wholesale as sellers) and serves 208,982 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 86% of the 332 systems serving 100,001–250,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2023, was 0.8 ppb, below the 15 ppb action level that applied. That’s lower than 62% 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. FL6290388.
6 home internet providers serve Keystone
99% of 9,767 addresses can get 100/20 Mbps; 94% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 98% | 1,000/35 |
| Frontier | Fiber | 92% | 7,000/7,000 |
| T-Mobile | Fixed wireless | 75% | 100/20 |
| Verizon | Fixed wireless | 66% | 300/20 |
| AT&T | Fixed wireless | 32% | 25/3 |
| Rapid Systems | Fixed wireless | 15% | 50/10 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Keystone’s trash rules yet
Pickup rules, the dump and recycling in Keystone.
Where your child goes to school
Public school districts and the school path by grade.
Keystone is in Hillsborough County School District.
C+School gradeSee 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
Keystone is unincorporated, so Hillsborough County is the local government.
Election office: FVAP local election office directory, updated Nov 2023; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 17, 2025.
Keystone spans 3 ZIP codes
ZIP codes where Keystone residents live, with the share of the town in each.
| ZIP | Post office name | Share of Keystone | ZIP’s residents in Keystone |
|---|---|---|---|
| 33556 | Odessa, FL | 61% | 50% |
| 33626 | Tampa, FL | 23% | 19% |
| 33558 | Lutz, FL | 16% | 15% |
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 Keystone
Who supplies Keystone’s drinking water, and has it had violations?
Hcwrc/Northwest Utilities (EPA ID FL6290388). It reported no health-based violations to EPA in the five years to October 2026; 86% of systems its size had none. Its latest lead 90th percentile was 0.8 ppb (Jan–Dec 2023), against a 15 ppb action level.
Who provides electricity in Keystone?
Duke Energy (Duke Energy Florida, LLC), an investor-owned utility. Its homes paid about 18.4¢ per kWh in 2025 (EIA).
What internet providers serve Keystone?
Spectrum, Frontier, T-Mobile, Verizon, AT&T, Rapid Systems (FCC, as of December 2025).
What ZIP codes are in Keystone?
33556 (61%), 33626 (23%), 33558 (16%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Keystone in?
Hillsborough County School District.
How do I register to vote in Keystone?
In Florida 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 Hillsborough Supervisor of Elections. Check your registration at registration.elections.myflorida.com.
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 17, 2025 (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.