Photo: Robert Ashworth from Bellingham, WA., USA · CC BY 2.0Living in St. John, WA: what to set up and who to call
All of St. John gets its mail under one ZIP code, 99171. For an emergency, Whitman Hospital and Medical Center is the closest ER, 18.4 miles away.
I’m new in town
What to set up in St. John, 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. John.
Power comes from Avista
Avista (Avista Corp.), an investor-owned utility, serves all of St. John. Its homes paid an average of 14.2¢ per kWh in 2025, about $130 a month (its average across Washington).
Start or move service: avistacorp.com · (509) 489-0500
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Town of St John water system
The Town of St John water system supplies almost all of St. John. It draws ground water and serves 800 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 5,327 systems serving 501–1,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2022–Dec 2024, was 2.2 ppb, below the 15 ppb action level that applied. The highest in five years was 2.3 ppb. That’s higher than 75% 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. WA5375300.
2 home internet providers serve St. John
100% of 369 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| St John Cable Company | Fiber | 100% | 1,000/1,000 |
| Ziply Fiber | Fixed wireless | 5% | 10/1 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have St. John’s trash rules yet
Pickup rules, the dump and recycling in St. John.
Where your child goes to school
Public school districts and the school path by grade.
St. John is in St. John 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.
Town hall and registering to vote
Who to call, and how to register.
Election office: FVAP local election office directory, updated Sep 2024; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 30, 2026.
St. John is in ZIP code 99171
ZIP codes where St. John residents live, with the share of the town in each.
| ZIP | Post office name | Share of St. John | ZIP’s residents in St. John |
|---|---|---|---|
| 99171 | Saint John, WA | 100% | 61% |
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 St. John
Who supplies St. John’s drinking water, and has it had violations?
The Town of St John water system (EPA ID WA5375300). 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 2.2 ppb (Jan 2022–Dec 2024), against a 15 ppb action level.
Who provides electricity in St. John?
Avista (Avista Corp.), an investor-owned utility. Its homes paid about 14.2¢ per kWh in 2025 (EIA).
What internet providers serve St. John?
St John Cable Company, Ziply Fiber (FCC, as of December 2025).
What ZIP codes are in St. John?
99171. Census 2020 ZIP Code Tabulation Areas.
What school district is St. John in?
St. John School District.
How do I register to vote in St. John?
In Washington you can register online until 8 days before Election Day, in person up to and including Election Day, or by mail (received 8 days before). Elections here are run by the Whitman County Auditor. Check your registration at voter.votewa.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 Sep 30, 2026 (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.