Hole-In-The-Rock · Photo: G. Thomas at en.wikipedia · Public domainLiving in Navajo Mountain, UT: what to set up and who to call
Navajo Mountain has no town government of its own, so San Juan County runs its elections and most services, and its children attend San Juan School District. Power in Navajo Mountain comes from Navajo Tribal Utility Authority, a state utility rather than a private company.
I’m new in town
What to set up in Navajo Mountain, 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 Navajo Mountain.
Power comes from Navajo Tribal Utility Authority
Navajo Tribal Utility Authority (Navajo Tribal Utility Authority), a state utility, serves all of Navajo Mountain. Its homes paid an average of 14.6¢ per kWh in 2025, about $84 a month (its average across Utah).
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 Navajo Mountain Community Boarding School Bia
Navajo Mountain Community Boarding School Bia supplies Navajo Mountain: 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 buys treated ground water (EPA lists Inscription House-Navajo Mountain Ntua as seller) and serves 163 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 0.7 ppb, below the 15 ppb action level that applied. The highest in five years was 1.0 ppb. 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. NN4933011.
Which providers serve Navajo Mountain
This card will list the home internet providers the FCC’s National Broadband Map shows in Navajo Mountain, 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 Navajo Mountain’s trash rules yet
Pickup rules, the dump and recycling in Navajo Mountain.
Where your child goes to school
Public school districts and the school path by grade.
Navajo Mountain is in San Juan 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.
No town hall: the county runs things
Navajo Mountain is unincorporated, so San Juan County is the local government.
Election office: FVAP local election office directory, updated Nov 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Mar 13, 2026.
Navajo Mountain is in ZIP code 86044
ZIP codes where Navajo Mountain residents live, with the share of the town in each.
| ZIP | Post office name | Share of Navajo Mountain | ZIP’s residents in Navajo Mountain |
|---|---|---|---|
| 86044 | Tonalea, AZ | 100% | 11% |
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 Navajo Mountain
Who supplies Navajo Mountain’s drinking water, and has it had violations?
Navajo Mountain Community Boarding School Bia (EPA ID NN4933011). 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 0.7 ppb (Jan 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in Navajo Mountain?
Navajo Tribal Utility Authority (Navajo Tribal Utility Authority), a state utility. Its homes paid about 14.6¢ per kWh in 2025 (EIA).
What ZIP codes are in Navajo Mountain?
86044. Census 2020 ZIP Code Tabulation Areas.
What school district is Navajo Mountain in?
San Juan School District.
How do I register to vote in Navajo Mountain?
In Utah you can register online until 11 days before Election Day, in person up to and including Election Day, or by mail (received 11 days before). Elections here are run by the San Juan County Clerk. Check your registration at votesearch.utah.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 Mar 13, 2026 (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.