Living in Round Rock, AZ: what to set up and who to call
Round Rock has no town government of its own, so Apache County runs its elections and most services, and its children attend Red Mesa Unified District. Power in Round Rock comes from Navajo Tribal Utility Authority, a state utility rather than a private company.
I’m new in town
What to set up in Round Rock, 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 Round Rock.
Power comes from Navajo Tribal Utility Authority
Navajo Tribal Utility Authority (Navajo Tribal Utility Authority), a state utility, serves all of Round Rock. Its homes paid an average of 16.5¢ per kWh in 2025, about $81 a month (its average across Arizona).
Start or move service: ntua.com · (800) 528-5011
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Round Rock Ntua water system
The Round Rock Ntua water system supplies Round Rock: about 0% of residents live in its service area. About 100% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws ground water and serves 876 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 5,327 systems serving 501–1,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2023–Dec 2025, was 1.0 ppb, below the 15 ppb action level that applied. The highest in five years was 3.0 ppb. That’s lower than 51% 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. NN0403023.
Which providers serve Round Rock
This card will list the home internet providers the FCC’s National Broadband Map shows in Round Rock, 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 Round Rock’s trash rules yet
Pickup rules, the dump and recycling in Round Rock.
Where your child goes to school
Public school districts and the school path by grade.
Most of Round Rock (98%) is in Red Mesa Unified 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.
No town hall: the county runs things
Round Rock is unincorporated, so Apache County is the local government.
Election office: FVAP local election office directory, updated Sep 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 12, 2025.
Round Rock is in ZIP code 86547
ZIP codes where Round Rock residents live, with the share of the town in each.
| ZIP | Post office name | Share of Round Rock | ZIP’s residents in Round Rock |
|---|---|---|---|
| 86547 | Round Rock, AZ | 100% | 58% |
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.
Questions about living in Round Rock
Who supplies Round Rock’s drinking water, and has it had violations?
The Round Rock Ntua water system (EPA ID NN0403023). 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 1.0 ppb (Jan 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in Round Rock?
Navajo Tribal Utility Authority (Navajo Tribal Utility Authority), a state utility. Its homes paid about 16.5¢ per kWh in 2025 (EIA).
What ZIP codes are in Round Rock?
86547. Census 2020 ZIP Code Tabulation Areas.
What school district is Round Rock in?
Red Mesa Unified District.
How do I register to vote in Round Rock?
In Arizona you can register online until 29 days before Election Day, in person until 29 days before Election Day, or by mail (postmarked 29 days before). Elections here are run by the Apache County Recorder. Check your registration at my.arizona.vote.
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 Sep 12, 2025 (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.