Living in Alhambra Valley, CA: what to set up and who to call
Alhambra Valley has no town government of its own, so Contra Costa County runs its elections and most services, and its children attend Martinez Unified School District. The closest public drop-off to Alhambra Valley is Concord Recycling Center, 4 miles out; the town decides whether residents may use it.
I’m new in town
What to set up in Alhambra 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 Alhambra Valley.
Power comes from PG&E
PG&E (Pacific Gas & Electric Co.), an investor-owned utility, serves all of Alhambra Valley. Its homes paid an average of 37.5¢ per kWh in 2025, about $174 a month (its average across California, for customers on its standard service). California lets you buy power from another supplier; 66% of PG&E’s home customers do, and PG&E still delivers it.
Start or move service: pgecorp.com
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from City of Martinez water system
The City of Martinez water system supplies Alhambra Valley: about 51% of residents live in its service area. About 49% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It buys treated surface water (EPA lists Contra Costa Water District as seller) and serves 30,997 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 83% of the 3,525 systems serving 10,001–50,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2023–Dec 2025, was 0.0 ppb, below the 15 ppb action level that applied. The highest in five years was 2.6 ppb. 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. CA0710006.
5 home internet providers serve Alhambra Valley
99% of 321 addresses can get 100/20 Mbps; 54% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable | 99% | 2,000/250 |
| AT&T | Fiber, Fixed wireless | 58% | 5,000/5,000 |
| Verizon | Fixed wireless | 60% | 300/20 |
| T-Mobile | Fixed wireless | 56% | 100/20 |
| Unwired | Fixed wireless | 37% | 300/25 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
The nearest public drop-off is 4 miles away
Pickup rules, the dump and recycling in Alhambra Valley.
Concord Recycling Center
1320 Galaxy Way, Concord, CA, 94520
This isn’t Alhambra Valley’s own facility. Whether Alhambra Valley residents may use it is the town’s rule: check the town’s office.
OpenStreetMap, as of Oct 9, 2026. © OpenStreetMap contributors.
Where your child goes to school
Public school districts and the school path by grade.
Alhambra Valley is in Martinez Unified 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
Alhambra Valley is unincorporated, so Contra Costa County is the local government.
Election office: FVAP local election office directory, updated Aug 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Alhambra Valley is in ZIP code 94553
ZIP codes where Alhambra Valley residents live, with the share of the town in each.
| ZIP | Post office name | Share of Alhambra Valley | ZIP’s residents in Alhambra Valley |
|---|---|---|---|
| 94553 | Martinez, CA | 100% | 2% |
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 Alhambra Valley
Who supplies Alhambra Valley’s drinking water, and has it had violations?
The City of Martinez water system (EPA ID CA0710006). It reported no health-based violations to EPA in the five years to October 2026; 83% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in Alhambra Valley?
PG&E (Pacific Gas & Electric Co.), an investor-owned utility. Its homes paid about 37.5¢ per kWh in 2025 (EIA).
What internet providers serve Alhambra Valley?
Xfinity, AT&T, Verizon, T-Mobile, Unwired (FCC, as of December 2025).
What ZIP codes are in Alhambra Valley?
94553. Census 2020 ZIP Code Tabulation Areas.
What school district is Alhambra Valley in?
Martinez Unified School District.
How do I register to vote in Alhambra Valley?
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 Contra Costa County Elections Division. 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.