Photo: Applejuicefool Roger D. Cline. Creator of artwork on tank unknown. · CC BY-SA 3.0Living in Coahoma, TX: what to set up and who to call
The City of Coahoma water system reported 7 health-based violations to EPA in the last five years: disinfection byproducts (TTHM) ×7. 80% of systems its size reported none. Oncor delivers the power in Coahoma, but in Texas’s open market you choose the company that sells it.
I’m new in town
What to set up in Coahoma, 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 Coahoma.
Power comes from Oncor
Oncor (Oncor Electric Delivery Co.), an investor-owned utility, serves all of Coahoma.
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 Coahoma water system
The City of Coahoma water system supplies almost all of Coahoma. It buys treated surface water (EPA lists City of Big Spring as seller) and serves 3,552 people in all.
7 health-based violations reported to EPA in the five years to October 2026: disinfection byproducts (TTHM) ×7, the latest beginning Jul 2023. 80% of the 5,012 systems serving 3,301–10,000 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2024–Dec 2026, was 2.4 ppb, below the 15 ppb action level that applied. That’s higher than 76% 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. TX1140002.
6 home internet providers serve Coahoma
100% of 511 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Wes Tex Telephone Cooperative | Fiber, Fixed wireless | 100% | 1,000/1,000 |
| Optimum | Cable | 85% | 940/35 |
| T-Mobile | Fixed wireless | 78% | 100/20 |
| Verizon | Fixed wireless | 73% | 300/20 |
| AT&T | Fixed wireless | 64% | 100/20 |
| Nextlink | Fixed wireless | 35% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Coahoma’s trash rules yet
Pickup rules, the dump and recycling in Coahoma.
Where your child goes to school
Public school districts and the school path by grade.
Coahoma is in Coahoma 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.
Town hall and registering to vote
Who to call, and how to register.
Election office: FVAP local election office directory, updated Jun 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Coahoma spans 2 ZIP codes
ZIP codes where Coahoma residents live, with the share of the town in each.
| ZIP | Post office name | Share of Coahoma | ZIP’s residents in Coahoma |
|---|---|---|---|
| 79511 | Coahoma, TX | 92% | 74% |
| 79720 | Big Spring, TX | 8% | 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 Coahoma
Who supplies Coahoma’s drinking water, and has it had violations?
The City of Coahoma water system (EPA ID TX1140002). It reported 7 health-based violations to EPA in the five years to October 2026: disinfection byproducts (TTHM) ×7. 80% of systems its size had none. Its latest lead 90th percentile was 2.4 ppb (Jan 2024–Dec 2026), against a 15 ppb action level.
Who provides electricity in Coahoma?
Oncor (Oncor Electric Delivery Co.), an investor-owned utility.
What internet providers serve Coahoma?
Wes Tex Telephone Cooperative, Optimum, T-Mobile, Verizon, AT&T, Nextlink (FCC, as of December 2025).
What ZIP codes are in Coahoma?
79511 (92%), 79720 (8%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Coahoma in?
Coahoma Independent School District.
How do I register to vote in Coahoma?
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 Howard 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.