Living in Seis Lagos, TX: what to set up and who to call
Seis Lagos has no town government of its own, so Collin County runs its elections and most services, and its children attend Wylie Independent School District. Oncor delivers the power in Seis Lagos, but in Texas’s open market you choose the company that sells it.
I’m new in town
What to set up in Seis Lagos, 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 Seis Lagos.
Power comes from Oncor
Oncor (Oncor Electric Delivery Co.), an investor-owned utility, serves all of Seis Lagos.
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 Seis Lagos Utility District
Seis Lagos Utility District supplies almost all of Seis Lagos. It buys treated surface water (EPA lists North Texas Mwd Wylie WTP as seller) and serves 2,037 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 7,966 systems serving 1,001–3,300 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2020–Dec 2022, was 0.9 ppb, below the 15 ppb action level that applied. That’s lower 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. TX0430057.
7 home internet providers serve Seis Lagos
100% of 474 addresses can get 100/20 Mbps; 96% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Frontier | Fiber | 96% | 7,000/7,000 |
| Optimum | Cable | 75% | 940/35 |
| Spectrum | Fiber, Cable | 7% | 1,000/500 |
| Rise Broadband | Fixed wireless | 95% | 300/60 |
| AT&T | Fixed wireless | 76% | 25/3 |
| Verizon | Fixed wireless | 40% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Seis Lagos’ trash rules yet
Pickup rules, the dump and recycling in Seis Lagos.
Where your child goes to school
Public school districts and the school path by grade.
Most of Seis Lagos (57%) is in Wylie Independent School District; parts are in Lovejoy Independent School District (43%).
ASchool gradeSee 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
Seis Lagos is unincorporated, so Collin County is the local government.
Election office: FVAP local election office directory, updated Apr 2024; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Seis Lagos spans 2 ZIP codes
ZIP codes where Seis Lagos residents live, with the share of the town in each.
| ZIP | Post office name | Share of Seis Lagos | ZIP’s residents in Seis Lagos |
|---|---|---|---|
| 75098 | Wylie, TX | 85% | 2% |
| 75002 | Allen, TX | 15% | 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 Seis Lagos
Who supplies Seis Lagos’ drinking water, and has it had violations?
Seis Lagos Utility District (EPA ID TX0430057). It reported no health-based violations to EPA in the five years to October 2026; 78% of systems its size had none. Its latest lead 90th percentile was 0.9 ppb (Jan 2020–Dec 2022), against a 15 ppb action level.
Who provides electricity in Seis Lagos?
Oncor (Oncor Electric Delivery Co.), an investor-owned utility.
What internet providers serve Seis Lagos?
Frontier, Optimum, Spectrum, Rise Broadband, AT&T, Verizon (FCC, as of December 2025).
What ZIP codes are in Seis Lagos?
75098 (85%), 75002 (15%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Seis Lagos in?
Wylie Independent School District. Parts of the city are in Lovejoy Independent School District.
How do I register to vote in Seis Lagos?
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 Collin 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.