Tocaloma Bridge · Photo: Ian Poellet · CC BY-SA 4.0Living in Nicasio, CA: what to set up and who to call
Nicasio has no town government of its own, so Marin County runs its elections and most services, and its children attend Nicasio Elementary School District. Novato Community Hospital, 8.1 miles away, is the nearest emergency room.
I’m new in town
What to set up in Nicasio, 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 Nicasio.
Power comes from PG&E
PG&E (Pacific Gas & Electric Co.), an investor-owned utility, serves all of Nicasio. 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 Nicasio Valley Ranch Mutual water system
The Nicasio Valley Ranch Mutual water system supplies Nicasio: about 36% of residents live in its service area. About 64% 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 36 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 2022–Dec 2024, was 4.0 ppb, below the 15 ppb action level that applied. That’s higher than 86% 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. CA2100579.
3 home internet providers serve Nicasio
76% of 38 addresses can get 100/20 Mbps; 70% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Inyo Networks | Fiber | 68% | 1,000/1,000 |
| Verizon | Fixed wireless | 84% | 300/20 |
| AT&T | Fixed wireless | 74% | 25/3 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Nicasio’s trash rules yet
Pickup rules, the dump and recycling in Nicasio.
Where your child goes to school
Public school districts and the school path by grade.
Nicasio is in two districts that split the grades: Nicasio Elementary School District and Tamalpais 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
Nicasio is unincorporated, so Marin County is the local government.
Election office: FVAP local election office directory, updated Jul 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Nicasio is in ZIP code 94946
ZIP codes where Nicasio residents live, with the share of the town in each.
| ZIP | Post office name | Share of Nicasio | ZIP’s residents in Nicasio |
|---|---|---|---|
| 94946 | Nicasio, CA | 100% | 13% |
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 Nicasio
Who supplies Nicasio’s drinking water, and has it had violations?
The Nicasio Valley Ranch Mutual water system (EPA ID CA2100579). 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 4.0 ppb (Jan 2022–Dec 2024), against a 15 ppb action level.
Who provides electricity in Nicasio?
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 Nicasio?
Inyo Networks, Verizon, AT&T (FCC, as of December 2025).
What ZIP codes are in Nicasio?
94946. Census 2020 ZIP Code Tabulation Areas.
What school district is Nicasio in?
Nicasio Elementary School District and Tamalpais Union High School District.
How do I register to vote in Nicasio?
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 Marin County Registrar of Voters. 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.