Photo: Renelibrary · CC BY-SA 4.0Living in Castroville, TX: what to set up and who to call
Castroville runs its own electric utility, City of Castroville. The City of Castroville water system has a clean five-year EPA record, but its latest lead result, 7.2 ppb, was higher than 96% of similar systems’ (the action level is 15).
I’m new in town
What to set up in Castroville, 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 Castroville.
Power comes from City of Castroville
City of Castroville (City of Castroville - (TX)), a municipal utility, serves 90.7% of Castroville residents.
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from City of Castroville water system
The City of Castroville water system supplies almost all of Castroville. It draws ground water and serves 3,913 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 80% of the 5,012 systems serving 3,301–10,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2024–Dec 2026, was 7.2 ppb, below the 15 ppb action level that applied. That’s higher than 96% 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. TX1630005.
6 home internet providers serve Castroville
100% of 1,191 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Rise Broadband | Fiber | 100% | 1,000/200 |
| Spectrum | Cable, Fiber | 93% | 1,000/1,000 |
| AT&T | DSL, Fixed wireless, Fiber | 87% | 5,000/5,000 |
| VTX1 | Fixed wireless | 99% | 400/50 |
| Verizon | Fixed wireless | 84% | 300/20 |
| T-Mobile | Fixed wireless | 57% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
Trash day in Castroville depends on your street
Pickup days, the drop-off and recycling in Castroville, from the town’s own site.
Your pickup week
- TrashEvery week, on your street’s dayFind your street’s day on castrovilletx.gov →
From castrovilletx.gov, the town’s official site, checked Oct 21, 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.
Castroville is in Medina Valley Independent School District.
A−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 Apr 2026; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Castroville is in ZIP code 78009
ZIP codes where Castroville residents live, with the share of the town in each.
| ZIP | Post office name | Share of Castroville | ZIP’s residents in Castroville |
|---|---|---|---|
| 78009 | Castroville, TX | 100% | 34% |
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 Castroville
Who supplies Castroville’s drinking water, and has it had violations?
The City of Castroville water system (EPA ID TX1630005). It reported no health-based violations to EPA in the five years to October 2026; 80% of systems its size had none. Its latest lead 90th percentile was 7.2 ppb (Jan 2024–Dec 2026), against a 15 ppb action level.
Who provides electricity in Castroville?
City of Castroville (City of Castroville - (TX)), a municipal utility.
What internet providers serve Castroville?
Rise Broadband, Spectrum, AT&T, VTX1, Verizon, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Castroville?
78009. Census 2020 ZIP Code Tabulation Areas.
What school district is Castroville in?
Medina Valley Independent School District.
How do I register to vote in Castroville?
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 Medina 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: Castroville’s own website (castrovilletx.gov), read Oct 21, 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.