Living in Willow Valley, AZ: what to set up and who to call
Willow Valley has no town government of its own, so Mohave County runs its elections and most services, and its children attend Colorado River Union High School District. The Epcor - Willow Valley/King Street water system reported one health-based violation to EPA in the last five years: chlorite, beginning Apr 2025.
I’m new in town
What to set up in Willow Valley, 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 Willow Valley.
Power comes from Mohave Electric Cooperative
Mohave Electric Cooperative (Mohave Electric Cooperative, Inc.), a cooperative utility, serves all of Willow Valley. Its homes paid an average of 11.3¢ per kWh in 2025, about $103 a month (its average across Arizona).
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Epcor - Willow Valley/King Street water system
The Epcor - Willow Valley/King Street water system supplies Willow Valley: about 49% of residents live in its service area. About 51% 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 3,408 people in all.
1 health-based violation reported to EPA in the five years to October 2026: chlorite, beginning Apr 2025. 80% of the 5,012 systems serving 3,301–10,000 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2021–Dec 2023, 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. AZ0408040.
5 home internet providers serve Willow Valley
99% of 1,359 addresses can get 100/20 Mbps; 54% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Optimum | Cable | 96% | 940/35 |
| TWN Communications | Fiber | 47% | 1,000/1,000 |
| Tristate Wi-Fi by Wi-Fiber | Fixed wireless | 100% | 400/400 |
| Verizon | Fixed wireless | 70% | 300/20 |
| AT&T | Fixed wireless | 7% | 25/3 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Willow Valley’s trash rules yet
Pickup rules, the dump and recycling in Willow Valley.
Where your child goes to school
Public school districts and the school path by grade.
Willow Valley is in two districts that split the grades: Colorado River Union High School District and Mohave Valley Elementary 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
Willow Valley is unincorporated, so Mohave 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.
Willow Valley is in ZIP code 86440
ZIP codes where Willow Valley residents live, with the share of the town in each.
| ZIP | Post office name | Share of Willow Valley | ZIP’s residents in Willow Valley |
|---|---|---|---|
| 86440 | Mohave Valley, AZ | 100% | 14% |
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 Willow Valley
Who supplies Willow Valley’s drinking water, and has it had violations?
The Epcor - Willow Valley/King Street water system (EPA ID AZ0408040). It reported 1 health-based violation to EPA in the five years to October 2026: chlorite. 80% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan 2021–Dec 2023), against a 15 ppb action level.
Who provides electricity in Willow Valley?
Mohave Electric Cooperative (Mohave Electric Cooperative, Inc.), a cooperative utility. Its homes paid about 11.3¢ per kWh in 2025 (EIA).
What internet providers serve Willow Valley?
Optimum, TWN Communications, Tristate Wi-Fi by Wi-Fiber, Verizon, AT&T (FCC, as of December 2025).
What ZIP codes are in Willow Valley?
86440. Census 2020 ZIP Code Tabulation Areas.
What school district is Willow Valley in?
Colorado River Union High School District and Mohave Valley Elementary District.
How do I register to vote in Willow Valley?
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 Mohave 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.