Photo: Famartin · CC BY-SA 4.0Living in Katy, TX: what to set up and who to call
CenterPoint Energy delivers the power in Katy, but in Texas’s open market you choose the company that sells it. Katy Branch Library, at 5414 Franz Rd, is the library in town.
I’m new in town
What to set up in Katy, 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 Katy.
Power comes from CenterPoint Energy
CenterPoint Energy (CenterPoint Energy), an investor-owned utility, serves all of Katy.
Start or move service: centerpointenergy.com · (800) 259-5544
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from City of Katy water system
The City of Katy water system supplies Katy: about 93% of residents live in its service area. About 7% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws ground water (EPA lists Fort Bend County MUD 37 as seller) and serves 25,253 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 2.7 ppb, below the 15 ppb action level that applied. That’s higher than 77% 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. TX1010017.
11 home internet providers serve Katy
100% of 9,040 addresses can get 100/20 Mbps; 82% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable, Fiber | 99% | 2,000/250 |
| Fidium Fiber | Fiber | 80% | 2,000/2,000 |
| AT&T | Fixed wireless, Fiber | 35% | 100/20 |
| Ezee Fiber | Fiber | 27% | 8,000/8,000 |
| Consolidated Communications | DSL | 11% | 150/30 |
| Astound Broadband | Fiber, Cable | 3% | 1,500/1,500 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Katy’s trash rules yet
Pickup rules, the dump and recycling in Katy.
Where your child goes to school
Public school districts and the school path by grade.
Most of Katy (94%) is in Katy Independent School District; parts are in Royal Independent School District (4%).
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 Jan 2026; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Katy spans 2 ZIP codes
ZIP codes where Katy residents live, with the share of the town in each.
| ZIP | Post office name | Share of Katy | ZIP’s residents in Katy |
|---|---|---|---|
| 77493 | Katy, TX | 74% | 31% |
| 77494 | Katy, TX | 26% | 4% |
A few homes fall in 77423. 77491, 77492 are P.O. box or single-organization ZIPs with no homes.
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 Katy
Who supplies Katy’s drinking water, and has it had violations?
The City of Katy water system (EPA ID TX1010017). 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 2.7 ppb (Jan 2024–Dec 2026), against a 15 ppb action level.
Who provides electricity in Katy?
CenterPoint Energy (CenterPoint Energy), an investor-owned utility.
What internet providers serve Katy?
Xfinity, Fidium Fiber, AT&T, Ezee Fiber, Consolidated Communications, Astound Broadband (FCC, as of December 2025).
What ZIP codes are in Katy?
77493 (74%), 77494 (26%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Katy in?
Katy Independent School District. Parts of the city are in Royal Independent School District.
How do I register to vote in Katy?
Texas has no online registration; you can register in person until 30 days before Election Day or by mail (postmarked 30 days before). Elections here are run by the Harris County Early Voting Clerk. Check your registration at teamrv-mvp.sos.texas.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.