Living in Alta Sierra, CA: what to set up and who to call
Alta Sierra has no town government of its own, so Kern County runs its elections and most services, and its children attend Kern High School District. Tap water in most of Alta Sierra comes from Alta Sierra Mutual Water Co., which has a clean five-year EPA record (about 23% of systems its size had a health-based violation) and a latest lead result below detection.
I’m new in town
What to set up in Alta Sierra, 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 Alta Sierra.
Power comes from Southern California Edison
Southern California Edison (Southern California Edison Co), an investor-owned utility, serves all of Alta Sierra. Its homes paid an average of 31.5¢ per kWh in 2025, about $149 a month (its average across California, for customers on its standard service). California lets you buy power from another supplier; 30% of Southern California Edison’s home customers do, and Southern California Edison still delivers it.
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Alta Sierra Mutual Water Co.
Alta Sierra Mutual Water Co. supplies Alta Sierra: about 55% of residents live in its service area. Sierra Bella Mutual Water Company serves another 45%. About 9% 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 143 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 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. CA1500209.
Which providers serve Alta Sierra
This card will list the home internet providers the FCC’s National Broadband Map shows in Alta Sierra, 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 Alta Sierra’s trash rules yet
Pickup rules, the dump and recycling in Alta Sierra.
Where your child goes to school
Public school districts and the school path by grade.
Alta Sierra is in two districts that split the grades: Kern High School District and Kernville Union Elementary 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
Alta Sierra is unincorporated, so Kern 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 Nov 18, 2024.
Alta Sierra is in ZIP code 93285
ZIP codes where Alta Sierra residents live, with the share of the town in each.
| ZIP | Post office name | Share of Alta Sierra | ZIP’s residents in Alta Sierra |
|---|---|---|---|
| 93285 | Wofford Heights, CA | 100% | 4% |
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 Alta Sierra
Who supplies Alta Sierra’s drinking water, and has it had violations?
Alta Sierra Mutual Water Co. (EPA ID CA1500209). 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 0.0 ppb (Jan 2021–Dec 2023), against a 15 ppb action level.
Who provides electricity in Alta Sierra?
Southern California Edison (Southern California Edison Co), an investor-owned utility. Its homes paid about 31.5¢ per kWh in 2025 (EIA).
What ZIP codes are in Alta Sierra?
93285. Census 2020 ZIP Code Tabulation Areas.
What school district is Alta Sierra in?
Kern High School District and Kernville Union Elementary School District.
How do I register to vote in Alta Sierra?
In California you can register online until 15 days before Election Day, in person up to and including Election Day, or by mail (postmarked 15 days before). Elections here are run by the Kern County Clerk - Elections Office. Check your registration at voterstatus.sos.ca.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 Nov 18, 2024 (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.