Living in Del Mar Heights, TX: what to set up and who to call
Del Mar Heights has no town government of its own, so Cameron County runs its elections and most services, and its children attend Los Fresnos Consolidated Independent School District. Tap water in Del Mar Heights comes from Military Hwy WSC Del Mar Heights, which has a clean five-year EPA record (about 23% of systems its size had a health-based violation) and a latest lead result of 1.0 ppb.
I’m new in town
What to set up in Del Mar 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 Del Mar Heights.
Power comes from Magic Valley Electric Coop
Magic Valley Electric Coop (Magic Valley Electric Coop Inc), a cooperative utility, serves all of Del Mar Heights. 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 Military Hwy WSC Del Mar Heights
Military Hwy WSC Del Mar Heights supplies Del Mar Heights: 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 buys treated surface water (EPA lists East Rio Hondo WSC as seller) and serves 213 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 77% of the 15,074 systems serving 101–500 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2024–Dec 2026, was 1.0 ppb, below the 15 ppb action level that applied. The highest in five years was 1.2 ppb. That’s higher than 52% 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. TX0310147.
3 home internet providers serve Del Mar Heights
100% of 27 addresses can get 100/20 Mbps; 98% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Fiber | 96% | 1,000/1,000 |
| Verizon | Fixed wireless | 85% | 300/20 |
| VTX1 | Fixed wireless | 52% | 300/50 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Del Mar Heights’ trash rules yet
Pickup rules, the dump and recycling in Del Mar Heights.
Where your child goes to school
Public school districts and the school path by grade.
Del Mar Heights is in Los Fresnos 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
Del Mar Heights is unincorporated, so Cameron County is the local government.
Election office: FVAP local election office directory, updated Jun 2023; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Del Mar Heights is in ZIP code 78566
ZIP codes where Del Mar Heights residents live, with the share of the town in each.
| ZIP | Post office name | Share of Del Mar Heights | ZIP’s residents in Del Mar Heights |
|---|---|---|---|
| 78566 | Los Fresnos, 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 Del Mar Heights
Who supplies Del Mar Heights’ drinking water, and has it had violations?
Military Hwy WSC Del Mar Heights (EPA ID TX0310147). It reported no health-based violations to EPA in the five years to October 2026; 77% of systems its size had none. Its latest lead 90th percentile was 1.0 ppb (Jan 2024–Dec 2026), against a 15 ppb action level.
Who provides electricity in Del Mar Heights?
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 Del Mar Heights?
Spectrum, Verizon, VTX1 (FCC, as of December 2025).
What ZIP codes are in Del Mar Heights?
78566. Census 2020 ZIP Code Tabulation Areas.
What school district is Del Mar Heights in?
Los Fresnos Consolidated Independent School District.
How do I register to vote in Del Mar 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 Cameron 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.