Photo: The original uploader was Tillman at English Wikipedia. · CC BY 2.0Living in Ajo, AZ: what to set up and who to call
Ajo has no town government of its own, so Pima County runs its elections and most services, and its children attend Ajo Unified District. The nearest emergency room is Sells Hospital, 57.6 miles away.
I’m new in town
What to set up in Ajo, 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 Ajo.
Power comes from APS
APS (Arizona Public Service Co.), an investor-owned utility, serves all of Ajo. Its homes paid an average of 17.0¢ per kWh in 2025, about $165 a month (its average across Arizona).
Start or move service: aps.com
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Arizona Water Co - Ajo
Arizona Water Co - Ajo supplies Ajo: about 33% of residents live in its service area. Charco 27 serves another 10%. Ajo Dwid serves another 9%. About 59% 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 Ajo Improvement Company as seller) and serves 2,100 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 2024–Dec 2026, was 0.0 ppb, below the 15 ppb action level that applied. Results below detection are reported as 0, so 0 doesn’t mean no lead at any tap.
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. AZ0410003.
3 home internet providers serve Ajo
100% of 1,985 addresses can get 100/20 Mbps; 13% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Table Top Telephone | Fixed wireless, DSL, Fiber | 100% | 1,000/1,000 |
| Free Range Internet | Fixed wireless | 100% | 500/500 |
| Verizon | Fixed wireless | 94% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Ajo’s trash rules yet
Pickup rules, the dump and recycling in Ajo.
Where your child goes to school
Public school districts and the school path by grade.
Ajo is in Ajo 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
Ajo is unincorporated, so Pima 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.
Ajo is in ZIP code 85321
ZIP codes where Ajo residents live, with the share of the town in each.
| ZIP | Post office name | Share of Ajo | ZIP’s residents in Ajo |
|---|---|---|---|
| 85321 | Ajo, AZ | 100% | 83% |
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 Ajo
Who supplies Ajo’s drinking water, and has it had violations?
Arizona Water Co - Ajo (EPA ID AZ0410003). 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 0.0 ppb (Jan 2024–Dec 2026), against a 15 ppb action level.
Who provides electricity in Ajo?
APS (Arizona Public Service Co.), an investor-owned utility. Its homes paid about 17.0¢ per kWh in 2025 (EIA).
What internet providers serve Ajo?
Table Top Telephone, Free Range Internet, Verizon (FCC, as of December 2025).
What ZIP codes are in Ajo?
85321. Census 2020 ZIP Code Tabulation Areas.
What school district is Ajo in?
Ajo Unified District.
How do I register to vote in Ajo?
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 Pima 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 National Broadband Map, as of December 2025.