Living in Lake Dunlap, TX: what to set up and who to call
Lake Dunlap has no town government of its own, so Guadalupe County runs its elections and most services, and its children attend New Braunfels Independent School District. Power in Lake Dunlap comes from City of San Antonio, a municipal utility rather than a private company.
I’m new in town
What to set up in Lake Dunlap, 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 Lake Dunlap.
Power comes from City of San Antonio
City of San Antonio (City of San Antonio - (TX)), a municipal utility, serves all of Lake Dunlap. Its homes paid an average of 12.4¢ per kWh in 2025, about $133 a month (its average across Texas).
Start or move service: cpsenergy.com · (800) 773-3077
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Green Valley SUD
Green Valley SUD supplies Lake Dunlap: about 88% of residents live in its service area. Garden Oaks serves another 11%. About 6% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It buys treated surface water (EPA lists Springs Hill SUD and Crwa Lake Dunlap WTP and Crwa Wells Ranch as sellers) and serves 52,497 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 90% of the 597 systems serving 50,001–100,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2023–Dec 2025, was 1.8 ppb, below the 15 ppb action level that applied. The highest in five years was 3.5 ppb. That’s higher than 64% 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. TX0940020.
6 home internet providers serve Lake Dunlap
100% of 968 addresses can get 100/20 Mbps; 35% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable | 98% | 1,000/35 |
| AT&T | DSL, Fiber, Fixed wireless | 86% | 5,000/5,000 |
| Verizon | Fixed wireless | 72% | 300/20 |
| VTX1 | Fixed wireless | 59% | 400/50 |
| Guadalupe Valley Electric Coop | Fixed wireless | 57% | 1,000/100 |
| T-Mobile | Fixed wireless | 45% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Lake Dunlap’s trash rules yet
Pickup rules, the dump and recycling in Lake Dunlap.
Where your child goes to school
Public school districts and the school path by grade.
Lake Dunlap is in New Braunfels Independent School District.
B+School 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
Lake Dunlap is unincorporated, so Guadalupe 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.
Lake Dunlap is in ZIP code 78130
ZIP codes where Lake Dunlap residents live, with the share of the town in each.
| ZIP | Post office name | Share of Lake Dunlap | ZIP’s residents in Lake Dunlap |
|---|---|---|---|
| 78130 | New Braunfels, TX | 100% | 2% |
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 Lake Dunlap
Who supplies Lake Dunlap’s drinking water, and has it had violations?
Green Valley SUD (EPA ID TX0940020). It reported no health-based violations to EPA in the five years to October 2026; 90% of systems its size had none. Its latest lead 90th percentile was 1.8 ppb (Jan 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in Lake Dunlap?
City of San Antonio (City of San Antonio - (TX)), a municipal utility. Its homes paid about 12.4¢ per kWh in 2025 (EIA).
What internet providers serve Lake Dunlap?
Spectrum, AT&T, Verizon, VTX1, Guadalupe Valley Electric Coop, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Lake Dunlap?
78130. Census 2020 ZIP Code Tabulation Areas.
What school district is Lake Dunlap in?
New Braunfels Independent School District.
How do I register to vote in Lake Dunlap?
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 Guadalupe 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.