Photo: Unknown authorUnknown author or not provided · Public domainLiving in San Diego, TX: what to set up and who to call
An EPA health-based violation from 2024 is still open for San Diego MUD 1. Nueces Electric Cooperative delivers the power in San Diego, but in Texas’s open market you choose the company that sells it.
I’m new in town
What to set up in San Diego, 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 San Diego.
Power comes from Nueces Electric Cooperative
Nueces Electric Cooperative (Nueces Electric Cooperative), a cooperative utility, serves all of San Diego. Its homes paid an average of 11.3¢ per kWh in 2025, about $149 a month (its average across Texas).
Start or move service: nueceselectric.org · (800) 632-9288
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from San Diego MUD 1
San Diego MUD 1 supplies almost all of San Diego. It draws ground water and serves 6,291 people in all.
5 health-based violations reported to EPA in the five years to October 2026: arsenic ×4, a lead and copper treatment requirement (Lead and Copper Rule Revisions), the latest beginning Oct 2024. 80% of the 5,012 systems serving 3,301–10,000 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. TX0660003.
5 home internet providers serve San Diego
100% of 1,732 addresses can get 100/20 Mbps; 2% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 96% | 1,000/1,000 |
| AT&T | DSL, Fixed wireless | 14% | 25/3 |
| Gtek Communications | Fixed wireless | 100% | 120/20 |
| VTX1 | Fixed wireless | 98% | 400/50 |
| T-Mobile | Fixed wireless | 35% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
Trash and recycling in San Diego
Pickup days, the drop-off and recycling in San Diego, from the town’s own site.
Accepted at the curb
- Paper/junk mail
- Cardboard
- Newspaper
We couldn’t find pickup days or drop-off hours. Check cityofsandiegotx.com →
From cityofsandiegotx.com, the town’s official site, checked Oct 23, 2026. Rules change: the town’s page is the last word. .
Where your child goes to school
Public school districts and the school path by grade.
San Diego is in San Diego 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.
Town hall and registering to vote
Who to call, and how to register.
Election office: FVAP local election office directory, updated Jun 2023; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
San Diego is in ZIP code 78384
ZIP codes where San Diego residents live, with the share of the town in each.
| ZIP | Post office name | Share of San Diego | ZIP’s residents in San Diego |
|---|---|---|---|
| 78384 | San Diego, TX | 100% | 66% |
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 San Diego
Who supplies San Diego’s drinking water, and has it had violations?
San Diego MUD 1 (EPA ID TX0660003). It reported 5 health-based violations to EPA in the five years to October 2026: arsenic ×4, a lead and copper treatment requirement (Lead and Copper Rule Revisions). 80% 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 San Diego?
Nueces Electric Cooperative (Nueces Electric Cooperative), a cooperative utility. Its homes paid about 11.3¢ per kWh in 2025 (EIA).
What internet providers serve San Diego?
Spectrum, AT&T, Gtek Communications, VTX1, T-Mobile (FCC, as of December 2025).
What ZIP codes are in San Diego?
78384. Census 2020 ZIP Code Tabulation Areas.
What school district is San Diego in?
San Diego Independent School District.
How do I register to vote in San Diego?
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 Duval 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: San Diego’s own website (cityofsandiegotx.com), read Oct 23, 2026, pickup and drop-off facts extracted and checked against the page they came from.
- 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.