Photo: Seth Eastman (1808–1875) · Public domainLiving in Fort Defiance, AZ: what to set up and who to call
Fort Defiance has no town government of its own, so Apache County runs its elections and most services, and its children attend Window Rock Unified District. Power in Fort Defiance comes from Navajo Tribal Utility Authority, a state utility rather than a private company.
I’m new in town
What to set up in Fort Defiance, 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 Fort Defiance.
Power comes from Navajo Tribal Utility Authority
Navajo Tribal Utility Authority (Navajo Tribal Utility Authority), a state utility, serves all of Fort Defiance. 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 Tsehootsooi Middle School water system
The Tsehootsooi Middle School water system supplies Fort Defiance: 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 Fort Defiance-Window Rock-St Michaels Ntua as seller) and serves 875 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 Jul–Dec 2025, was 2.1 ppb, below the 15 ppb action level that applied. That’s higher than 74% 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. NN0400181.
Which providers serve Fort Defiance
This card will list the home internet providers the FCC’s National Broadband Map shows in Fort Defiance, 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 Fort Defiance’s trash rules yet
Pickup rules, the dump and recycling in Fort Defiance.
Where your child goes to school
Public school districts and the school path by grade.
Fort Defiance is in Window Rock Unified District.
CSchool 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
Fort Defiance 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.
Fort Defiance is in ZIP code 86504
ZIP codes where Fort Defiance residents live, with the share of the town in each.
| ZIP | Post office name | Share of Fort Defiance | ZIP’s residents in Fort Defiance |
|---|---|---|---|
| 86504 | Fort Defiance, AZ | 100% | 62% |
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 Fort Defiance
Who supplies Fort Defiance’s drinking water, and has it had violations?
The Tsehootsooi Middle School water system (EPA ID NN0400181). 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 2.1 ppb (Jul–Dec 2025), against a 15 ppb action level.
Who provides electricity in Fort Defiance?
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 Fort Defiance?
86504. Census 2020 ZIP Code Tabulation Areas.
What school district is Fort Defiance in?
Window Rock Unified District.
How do I register to vote in Fort Defiance?
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.