Living in Knightsen, CA: what to set up and who to call
Knightsen has no town government of its own, so Contra Costa County runs its elections and most services, and its children attend Liberty Union High School District. The closest public drop-off to Knightsen is Cardboard Drop Off, 2 miles out; the town decides whether residents may use it.
I’m new in town
What to set up in Knightsen, 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 Knightsen.
Power comes from PG&E
PG&E (Pacific Gas & Electric Co.), an investor-owned utility, serves all of Knightsen. 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 Knightsen Community Water System
Knightsen Community Water System supplies Knightsen: about 32% of residents live in its service area. Diablo Water District serves another 7%. About 61% 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 73 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 11,392 systems serving <=100 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2020–Dec 2022, was 1.1 ppb, below the 15 ppb action level that applied. That’s higher than 62% 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. CA0707547.
5 home internet providers serve Knightsen
100% of 530 addresses can get 100/20 Mbps; 0% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable | 69% | 1,200/35 |
| AT&T | Fixed wireless, DSL | 50% | 25/3 |
| Unwired | Fixed wireless | 100% | 300/25 |
| Verizon | Fixed wireless | 73% | 300/20 |
| T-Mobile | Fixed wireless | 69% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
The nearest public drop-off is 2 miles away
Pickup rules, the dump and recycling in Knightsen.
Cardboard Drop Off
2300 Elkins Way, Brentwood, CA, 94513 · run by City of Brentwood
This isn’t Knightsen’s own facility. Whether Knightsen 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.
Knightsen is in two districts that split the grades: Liberty Union High School District and Knightsen Elementary School District.
B+School gradeSee 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
Knightsen 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.
Knightsen spans 3 ZIP codes
ZIP codes where Knightsen residents live, with the share of the town in each.
| ZIP | Post office name | Share of Knightsen | ZIP’s residents in Knightsen |
|---|---|---|---|
| 94513 | Brentwood, CA | 66% | 2% |
| 94548 | Knightsen, CA | 26% | 100% |
| 94561 | Oakley, CA | 8% | 0% |
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 Knightsen
Who supplies Knightsen’s drinking water, and has it had violations?
Knightsen Community Water System (EPA ID CA0707547). It reported no health-based violations to EPA in the five years to October 2026; 78% of systems its size had none. Its latest lead 90th percentile was 1.1 ppb (Jan 2020–Dec 2022), against a 15 ppb action level.
Who provides electricity in Knightsen?
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 Knightsen?
Xfinity, AT&T, Unwired, Verizon, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Knightsen?
94513 (66%), 94548 (26%), 94561 (8%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Knightsen in?
Liberty Union High School District and Knightsen Elementary School District. Parts of the city are in Oakley Union Elementary School District.
How do I register to vote in Knightsen?
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.