Living in Rock Island, TX: what to set up and who to call
Rock Island has no town government of its own, so Colorado County runs its elections and most services, and its children attend Columbus Independent School District. Tap water in Rock Island comes from Rock Island WSC, which has a clean five-year EPA record (about 23% of systems its size had a health-based violation) and a latest lead result below detection.
I’m new in town
What to set up in Rock Island, 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 Rock Island.
Power comes from Bluebonnet Electric Coop
Bluebonnet Electric Coop (Bluebonnet Electric Coop, Inc), a cooperative utility, serves all of Rock Island. Its homes paid an average of 11.6¢ per kWh in 2025, about $144 a month (its average across Texas).
Start or move service: bluebonnetelectric.coop · (888) 622-2583
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Rock Island WSC
Rock Island WSC supplies almost all of Rock Island. It draws ground water and serves 230 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 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. TX0450015.
Which providers serve Rock Island
This card will list the home internet providers the FCC’s National Broadband Map shows in Rock Island, the share of addresses that can get 100/20 Mbps and the share with fiber, with the map’s “as of” date.
Source to come: FCC Broadband Data Collection.
We don’t have Rock Island’s trash rules yet
Pickup rules, the dump and recycling in Rock Island.
Where your child goes to school
Public school districts and the school path by grade.
Most of Rock Island (72%) is in Columbus Independent School District; parts are in Rice Consolidated Independent School District (28%).
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
Rock Island is unincorporated, so Colorado 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.
Rock Island is in ZIP code 77470
ZIP codes where Rock Island residents live, with the share of the town in each.
| ZIP | Post office name | Share of Rock Island | ZIP’s residents in Rock Island |
|---|---|---|---|
| 77470 | Rock Island, TX | 100% | 83% |
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 Rock Island
Who supplies Rock Island’s drinking water, and has it had violations?
Rock Island WSC (EPA ID TX0450015). 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 0.0 ppb (Jan 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in Rock Island?
Bluebonnet Electric Coop (Bluebonnet Electric Coop, Inc), a cooperative utility. Its homes paid about 11.6¢ per kWh in 2025 (EIA).
What ZIP codes are in Rock Island?
77470. Census 2020 ZIP Code Tabulation Areas.
What school district is Rock Island in?
Columbus Independent School District. Parts of the city are in Rice Consolidated Independent School District.
How do I register to vote in Rock Island?
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 Colorado 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): pending.