Photo: Boereck 14:52, 27 July 2006 (UTC) · CC BY-SA 3.0Living in Clayton, CA: what to set up and who to call
All of Clayton gets its mail under one ZIP code, 94517. Clayton has its own library, Clayton Community Library, at 6125 Clayton Road.
I’m new in town
What to set up in Clayton, 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 Clayton.
Power comes from PG&E
PG&E (Pacific Gas & Electric Co.), an investor-owned utility, serves all of Clayton. 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 Contra Costa Water District
Contra Costa Water District supplies almost all of Clayton. It draws surface water (EPA lists the East Bay Municipal Utility District (EBMUD) and Randall-Bold Water Treatment Plant as sellers) and serves 198,000 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 86% of the 332 systems serving 100,001–250,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2026–Dec 2028, was 0.0 ppb, below the 15 ppb action level that applied. The highest in five years was 3.2 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. CA0710003.
6 home internet providers serve Clayton
100% of 3,826 addresses can get 100/20 Mbps; 12% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable | 100% | 2,000/250 |
| AT&T | DSL, Fixed wireless, Fiber | 73% | 5,000/5,000 |
| Astound Broadband | Cable | 3% | 1,500/50 |
| Unwired | Fixed wireless | 84% | 300/25 |
| T-Mobile | Fixed wireless | 79% | 100/20 |
| Verizon | Fixed wireless | 58% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
Trash day in Clayton depends on your street
Pickup days, the drop-off and recycling in Clayton, from the town’s own site.
Your pickup week
- TrashEvery week, on your street’s dayFind your street’s day on claytonca.gov →
- RecyclingEvery week
From claytonca.gov, the town’s official site, checked Oct 21, 2026; pages dated January 1, 2022. Rules change: the town’s page is the last word. .
Where your child goes to school
Public school districts and the school path by grade.
Clayton is in Mount Diablo Unified School District.
BSchool gradeSee Schools →U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.
Town hall and registering to vote
Who to call, and how to register.
Election office: FVAP local election office directory, updated Aug 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Clayton is in ZIP code 94517
ZIP codes where Clayton residents live, with the share of the town in each.
| ZIP | Post office name | Share of Clayton | ZIP’s residents in Clayton |
|---|---|---|---|
| 94517 | Clayton, CA | 100% | 88% |
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 Clayton
Who supplies Clayton’s drinking water, and has it had violations?
Contra Costa Water District (EPA ID CA0710003). It reported no health-based violations to EPA in the five years to October 2026; 86% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan 2026–Dec 2028), against a 15 ppb action level.
Who provides electricity in Clayton?
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 Clayton?
Xfinity, AT&T, Astound Broadband, Unwired, T-Mobile, Verizon (FCC, as of December 2025).
What ZIP codes are in Clayton?
94517. Census 2020 ZIP Code Tabulation Areas.
What school district is Clayton in?
Mount Diablo Unified School District.
How do I register to vote in Clayton?
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: Clayton’s own website (claytonca.gov), read Oct 21, 2026, pickup and drop-off facts extracted and checked against the page they came from.
- 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.