Living in Alton, TX: what to set up and who to call
Oncor delivers the power in Alton, but in Texas’s open market you choose the company that sells it. For emergencies, Alton is closest to Mission Regional Medical Center, 6.3 miles away.
I’m new in town
What to set up in Alton, 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 Alton.
Power comes from Oncor
Oncor (Oncor Electric Delivery Co.), an investor-owned utility, serves all of Alton.
Start or move service: oncor.com · (888) 875-6279
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Sharyland WSC
Sharyland WSC supplies almost all of Alton. It draws surface water and serves 68,562 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 90% of the 597 systems serving 50,001–100,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Jun 2024, was 1.0 ppb, below the 15 ppb action level that applied. The highest in five years was 1.3 ppb. That’s lower than 57% 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. TX1080033.
8 home internet providers serve Alton
100% of 5,200 addresses can get 100/20 Mbps; 76% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 98% | 1,000/1,000 |
| Metronet | Fiber | 64% | 5,120/5,120 |
| AT&T | Fixed wireless, DSL, Fiber | 54% | 5,000/5,000 |
| Smartcom Telephone | Fiber | 12% | 5,000/5,000 |
| TWIN | Fixed wireless | 100% | 400/100 |
| Verizon | Fixed wireless | 75% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Alton’s trash rules yet
Pickup rules, the dump and recycling in Alton.
Where your child goes to school
Public school districts and the school path by grade.
Most of Alton (69%) is in Mission Consolidated Independent School District; parts are in Sharyland Independent School District (20%) and La Joya Independent School District (11%).
CSchool 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 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Alton is in ZIP code 78573
ZIP codes where Alton residents live, with the share of the town in each.
| ZIP | Post office name | Share of Alton | ZIP’s residents in Alton |
|---|---|---|---|
| 78573 | Mission, TX | 100% | 43% |
A few homes fall in 78574.
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 Alton
Who supplies Alton’s drinking water, and has it had violations?
Sharyland WSC (EPA ID TX1080033). It reported no health-based violations to EPA in the five years to October 2026; 90% of systems its size had none. Its latest lead 90th percentile was 1.0 ppb (Jan–Jun 2024), against a 15 ppb action level.
Who provides electricity in Alton?
Oncor (Oncor Electric Delivery Co.), an investor-owned utility.
What internet providers serve Alton?
Spectrum, Metronet, AT&T, Smartcom Telephone, TWIN, Verizon (FCC, as of December 2025).
What ZIP codes are in Alton?
78573. Census 2020 ZIP Code Tabulation Areas.
What school district is Alton in?
Mission Consolidated Independent School District. Parts of the city are in Sharyland Independent School District and La Joya Independent School District.
How do I register to vote in Alton?
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 Hidalgo 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.