Living in Castella, CA: what to set up and who to call
Castella has no town government of its own, so Shasta County runs its elections and most services, and its children attend Castle Rock Union Elementary School District. The Shasta Csa - Castella, #3 water system reported one health-based violation to EPA in the last five years: a lead and copper treatment requirement (Lead and Copper Rule Revisions), beginning Oct 2024.
I’m new in town
What to set up in Castella, 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 Castella.
Power comes from Pacific Power
Pacific Power (PacifiCorp), an investor-owned utility, serves all of Castella. Its homes paid an average of 24.2¢ per kWh in 2025, about $200 a month (its average across California).
Start or move service: pacificorp.com · (888) 221-7070
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Shasta Csa - Castella, #3 water system
The Shasta Csa - Castella, #3 water system supplies Castella: about 41% of residents live in its service area. Shasta Csa - Cragview, #23 serves another 37%. About 22% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws surface water and serves 333 people in all.
1 health-based violation reported to EPA in the five years to October 2026: a lead and copper treatment requirement (Lead and Copper Rule Revisions), beginning Oct 2024. 77% of the 15,074 systems serving 101–500 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2022–Dec 2024, was 2.2 ppb, below the 15 ppb action level that applied. The highest in five years was 10.2 ppb. That’s higher than 76% 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. CA4500015.
4 home internet providers serve Castella
55% of 147 addresses can get 100/20 Mbps; 0% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Vyve Broadband | Cable | 38% | 1,000/50 |
| AT&T | DSL | 4% | 10/1 |
| Verizon | Fixed wireless | 32% | 300/20 |
| T-Mobile | Fixed wireless | 12% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Castella’s trash rules yet
Pickup rules, the dump and recycling in Castella.
Where your child goes to school
Public school districts and the school path by grade.
Castella is in two districts that split the grades: Castle Rock Union Elementary School District and Dunsmuir Joint Union High 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
Castella is unincorporated, so Shasta 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.
Castella spans 2 ZIP codes
ZIP codes where Castella residents live, with the share of the town in each.
| ZIP | Post office name | Share of Castella | ZIP’s residents in Castella |
|---|---|---|---|
| 96025 | Dunsmuir, CA | 51% | 5% |
| 96017 | Castella, CA | 49% | 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 Castella
Who supplies Castella’s drinking water, and has it had violations?
The Shasta Csa - Castella, #3 water system (EPA ID CA4500015). It reported 1 health-based violation to EPA in the five years to October 2026: a lead and copper treatment requirement (Lead and Copper Rule Revisions). 77% of systems its size had none. Its latest lead 90th percentile was 2.2 ppb (Jan 2022–Dec 2024), against a 15 ppb action level.
Who provides electricity in Castella?
Pacific Power (PacifiCorp), an investor-owned utility. Its homes paid about 24.2¢ per kWh in 2025 (EIA).
What internet providers serve Castella?
Vyve Broadband, AT&T, Verizon, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Castella?
96025 (51%), 96017 (49%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Castella in?
Castle Rock Union Elementary School District and Dunsmuir Joint Union High School District.
How do I register to vote in Castella?
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 Shasta County Clerk-Elections. 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 National Broadband Map, as of December 2025.