Beringer Brothers-Los Hermanos Winery · Photo: Frank Schulenburg · CC BY-SA 4.0Living in St. Helena, CA: what to set up and who to call
The City of St. Helena water system reported 3 health-based violations to EPA in the last five years: disinfection byproducts (HAA5) ×3. 80% of systems its size reported none. Trains stop in St. Helena, at Krug Winery.
I’m new in town
What to set up in St. Helena, 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 St. Helena.
Power comes from PG&E
PG&E (Pacific Gas & Electric Co.), an investor-owned utility, serves all of St. Helena. 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 St. Helena water system
The City of St. Helena water system supplies almost all of St. Helena. It draws surface water (EPA lists City of Napa as seller) and serves 5,386 people in all.
3 health-based violations reported to EPA in the five years to October 2026: disinfection byproducts (HAA5) ×3, the latest beginning Jul 2023. 80% of the 5,012 systems serving 3,301–10,000 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2024–Dec 2026, was 0.0 ppb, below the 15 ppb action level that applied. 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. CA2810004.
4 home internet providers serve St. Helena
98% of 2,262 addresses can get 100/20 Mbps; 0% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable | 98% | 2,000/250 |
| AT&T | DSL, Fixed wireless | 84% | 10/1 |
| Verizon | Fixed wireless | 76% | 300/20 |
| Valley Internet | Fixed wireless | 15% | 150/75 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
A county or regional provider runs trash and recycling for St. Helena
Pickup days, the drop-off and recycling in St. Helena, from the town’s own site.
We couldn’t find pickup days or drop-off hours. Check cityofsthelena.gov →
From cityofsthelena.gov, the town’s official site, checked Oct 21, 2026. 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.
St. Helena is in St. Helena Unified School District.
A−School 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 Sep 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
St. Helena is in ZIP code 94574
ZIP codes where St. Helena residents live, with the share of the town in each.
| ZIP | Post office name | Share of St. Helena | ZIP’s residents in St. Helena |
|---|---|---|---|
| 94574 | Saint Helena, CA | 100% | 65% |
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.
Train: OpenStreetMap (© OpenStreetMap contributors). ER: CMS hospital data. Library: IMLS Public Libraries Survey, FY2024.
Questions about living in St. Helena
Who supplies St. Helena’s drinking water, and has it had violations?
The City of St. Helena water system (EPA ID CA2810004). It reported 3 health-based violations to EPA in the five years to October 2026: disinfection byproducts (HAA5) ×3. 80% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan 2024–Dec 2026), against a 15 ppb action level.
Who provides electricity in St. Helena?
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 St. Helena?
Xfinity, AT&T, Verizon, Valley Internet (FCC, as of December 2025).
What ZIP codes are in St. Helena?
94574. Census 2020 ZIP Code Tabulation Areas.
What school district is St. Helena in?
St. Helena Unified School District.
How do I register to vote in St. Helena?
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 Napa County Election 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: St. Helena’s own website (cityofsthelena.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.