Living in La Coma Heights, TX: what to set up and who to call
La Coma Heights has no town government of its own, so Hidalgo County runs its elections and most services, and its children attend Edinburg Consolidated Independent School District. The City of Edinburg water system reported one health-based violation to EPA in the last five years: disinfection byproducts (TTHM), beginning Jan 2025.
I’m new in town
What to set up in La Coma Heights, 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 La Coma Heights.
Power comes from Oncor
Oncor (Oncor Electric Delivery Co.), an investor-owned utility, serves all of La Coma Heights.
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 City of Edinburg water system
The City of Edinburg water system supplies almost all of La Coma Heights. It draws surface water (EPA lists Mcallen Public Utility and North Alamo WSC and Sharyland WSC as sellers) and serves 85,224 people in all.
1 health-based violation reported to EPA in the five years to October 2026: disinfection byproducts (TTHM), beginning Jan 2025. 90% of the 597 systems serving 50,001–100,000 people had none.
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. The highest in five years was 1.7 ppb. 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. TX1080004.
5 home internet providers serve La Coma Heights
100% of 41 addresses can get 100/20 Mbps; 24% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable | 98% | 1,000/1,000 |
| Valley Telephone Cooperative | Fiber, Fixed wireless | 24% | 1,000/1,000 |
| TWIN | Fixed wireless | 100% | 400/100 |
| VTX1 | Fixed wireless | 83% | 400/50 |
| T-Mobile | Fixed wireless | 46% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have La Coma Heights’ trash rules yet
Pickup rules, the dump and recycling in La Coma Heights.
Where your child goes to school
Public school districts and the school path by grade.
La Coma Heights is in Edinburg Consolidated Independent School District.
Test scores and every school: see 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
La Coma Heights is unincorporated, so Hidalgo 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.
La Coma Heights is in ZIP code 78542
ZIP codes where La Coma Heights residents live, with the share of the town in each.
| ZIP | Post office name | Share of La Coma Heights | ZIP’s residents in La Coma Heights |
|---|---|---|---|
| 78542 | Edinburg, TX | 100% | 0% |
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 La Coma Heights
Who supplies La Coma Heights’ drinking water, and has it had violations?
The City of Edinburg water system (EPA ID TX1080004). It reported 1 health-based violation to EPA in the five years to October 2026: disinfection byproducts (TTHM). 90% 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 La Coma Heights?
Oncor (Oncor Electric Delivery Co.), an investor-owned utility.
What internet providers serve La Coma Heights?
Spectrum, Valley Telephone Cooperative, TWIN, VTX1, T-Mobile (FCC, as of December 2025).
What ZIP codes are in La Coma Heights?
78542. Census 2020 ZIP Code Tabulation Areas.
What school district is La Coma Heights in?
Edinburg Consolidated Independent School District.
How do I register to vote in La Coma Heights?
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.