Living in Twin Lakes, WA: what to set up and who to call
The latest lead test reported by the North Twin Lakeview Assn water system, which supplies Twin Lakes, came in at 33.3 ppb (Jan 2021–Dec 2023), above the 15 ppb action level. Twin Lakes has no town government of its own, so Ferry County runs its elections and most services, and its children attend Inchelium School District.
I’m new in town
What to set up in Twin Lakes, 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 Twin Lakes.
Power comes from Avista
Avista (Avista Corp.), an investor-owned utility, serves all of Twin Lakes. 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 North Twin Lakeview Assn water system
The North Twin Lakeview Assn water system supplies Twin Lakes: about 46% of residents live in its service area. About 54% 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 88 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 2021–Dec 2023, was 33.3 ppb, above the 15 ppb action level that applied. That’s higher than 100% 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 (EPA’s estimate). Violations are counted by the start of their compliance period. WA5361480.
Which providers serve Twin Lakes
This card will list the home internet providers the FCC’s National Broadband Map shows in Twin Lakes, the share of addresses that can get 100/20 Mbps and the share with fiber, with the map’s “as of” date.
Source to come: FCC Broadband Data Collection.
We don’t have Twin Lakes’ trash rules yet
Pickup rules, the dump and recycling in Twin Lakes.
Where your child goes to school
Public school districts and the school path by grade.
Twin Lakes is in Inchelium 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
Twin Lakes is unincorporated, so Ferry County is the local government.
Election office: FVAP local election office directory, updated Jul 2019; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 30, 2026.
Twin Lakes is in ZIP code 99138
ZIP codes where Twin Lakes residents live, with the share of the town in each.
| ZIP | Post office name | Share of Twin Lakes | ZIP’s residents in Twin Lakes |
|---|---|---|---|
| 99138 | Inchelium, WA | 100% | 8% |
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 Twin Lakes
Who supplies Twin Lakes’ drinking water, and has it had violations?
The North Twin Lakeview Assn water system (EPA ID WA5361480). 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 33.3 ppb (Jan 2021–Dec 2023), against a 15 ppb action level.
Who provides electricity in Twin Lakes?
Avista (Avista Corp.), an investor-owned utility. Its homes paid about 14.2¢ per kWh in 2025 (EIA).
What ZIP codes are in Twin Lakes?
99138. Census 2020 ZIP Code Tabulation Areas.
What school district is Twin Lakes in?
Inchelium School District.
How do I register to vote in Twin Lakes?
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 Ferry 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): pending.