Living in Sebastian, TX: what to set up and who to call
An EPA health-based violation from 2024 is still open for Sebastian MUD. Sebastian has no town government of its own, so Willacy County runs its elections and most services, and its children attend Lyford Consolidated Independent School District.
I’m new in town
What to set up in Sebastian, 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 Sebastian.
Power comes from Magic Valley Electric Coop
Magic Valley Electric Coop (Magic Valley Electric Coop Inc), a cooperative utility, serves all of Sebastian. Its homes paid an average of 10.5¢ per kWh in 2025, about $140 a month (its average across Texas).
Start or move service: magicvalley.coop · (866) 225-5683
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Sebastian MUD
Sebastian MUD supplies Sebastian: about 96% of residents live in its service area. About 4% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws surface water (EPA lists North Alamo WSC as seller) and serves 1,884 people in all.
1 health-based violation reported to EPA in the five years to October 2026: a lead and copper treatment requirement (Lead and Copper Rule Revisions), beginning Oct 2024. 78% of the 7,966 systems serving 1,001–3,300 people had none. 1 older violation is still open, since 2024: a lead and copper treatment requirement (Lead and Copper Rule Revisions), per EPA’s records.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2023–Dec 2025, was 0.0 ppb, below the 15 ppb action level that applied. Results below detection are reported as 0, so 0 doesn’t mean no lead at any tap.
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. TX2450006.
4 home internet providers serve Sebastian
100% of 688 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| VTX1 | Fiber, Fixed wireless | 100% | 1,000/1,000 |
| Spectrum | Fiber, Cable | 86% | 1,000/1,000 |
| T-Mobile | Fixed wireless | 10% | 100/20 |
| Verizon | Fixed wireless | 6% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Sebastian’s trash rules yet
Pickup rules, the dump and recycling in Sebastian.
Where your child goes to school
Public school districts and the school path by grade.
Sebastian is in Lyford Consolidated Independent 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
Sebastian is unincorporated, so Willacy County is the local government.
Election office: FVAP local election office directory, updated Jun 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Sebastian is in ZIP code 78594
ZIP codes where Sebastian residents live, with the share of the town in each.
| ZIP | Post office name | Share of Sebastian | ZIP’s residents in Sebastian |
|---|---|---|---|
| 78594 | Sebastian, TX | 100% | 94% |
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 Sebastian
Who supplies Sebastian’s drinking water, and has it had violations?
Sebastian MUD (EPA ID TX2450006). It reported 1 health-based violation to EPA in the five years to October 2026: a lead and copper treatment requirement (Lead and Copper Rule Revisions). 78% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in Sebastian?
Magic Valley Electric Coop (Magic Valley Electric Coop Inc), a cooperative utility. Its homes paid about 10.5¢ per kWh in 2025 (EIA).
What internet providers serve Sebastian?
VTX1, Spectrum, T-Mobile, Verizon (FCC, as of December 2025).
What ZIP codes are in Sebastian?
78594. Census 2020 ZIP Code Tabulation Areas.
What school district is Sebastian in?
Lyford Consolidated Independent School District.
How do I register to vote in Sebastian?
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 Willacy 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.