Photo: unknown; rotated and color-corrected by Howcheng. · Public domainLiving in Summerhaven, AZ: what to set up and who to call
Summerhaven has no town government of its own, so Pima County runs its elections and most services. The Mt Lemmon Dwid water system has a clean five-year EPA record, but its latest lead result, 5.7 ppb, was higher than 92% of similar systems’ (the action level is 15).
I’m new in town
What to set up in Summerhaven, 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 Summerhaven.
Power comes from Trico Electric Cooperative
Trico Electric Cooperative (Trico Electric Cooperative Inc), a cooperative utility, serves all of Summerhaven. Its homes paid an average of 14.3¢ per kWh in 2025, about $131 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 Mt Lemmon Dwid water system
The Mt Lemmon Dwid water system supplies almost all of Summerhaven. It draws ground water and serves 290 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 5.7 ppb, below the 15 ppb action level that applied. That’s higher than 92% 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. AZ0410140.
Which providers serve Summerhaven
This card will list the home internet providers the FCC’s National Broadband Map shows in Summerhaven, 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 Summerhaven’s trash rules yet
Pickup rules, the dump and recycling in Summerhaven.
No town hall: the county runs things
Summerhaven 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.
Summerhaven is in ZIP code 85619
ZIP codes where Summerhaven residents live, with the share of the town in each.
| ZIP | Post office name | Share of Summerhaven | ZIP’s residents in Summerhaven |
|---|---|---|---|
| 85619 | Mount Lemmon, AZ | 100% | 63% |
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 Summerhaven
Who supplies Summerhaven’s drinking water, and has it had violations?
The Mt Lemmon Dwid water system (EPA ID AZ0410140). 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 5.7 ppb (Jan 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in Summerhaven?
Trico Electric Cooperative (Trico Electric Cooperative Inc), a cooperative utility. Its homes paid about 14.3¢ per kWh in 2025 (EIA).
What ZIP codes are in Summerhaven?
85619. Census 2020 ZIP Code Tabulation Areas.
How do I register to vote in Summerhaven?
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): pending.