Photo: Steven Pavlov · CC BY-SA 4.0Living in Coulee Dam, WA: what to set up and who to call
Coulee Dam runs its own electric utility, City of Coulee Dam. The closest ER is Coulee Medical Center, 2.3 miles away.
I’m new in town
What to set up in Coulee Dam, 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 Coulee Dam.
Power comes from City of Coulee Dam
City of Coulee Dam (City of Coulee Dam - (WA)), a municipal utility, serves 89.2% of Coulee Dam residents.
Start or move service: usbr.gov · (509) 633-9507
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Coulee Dam Water Dept
Coulee Dam Water Dept supplies almost all of Coulee Dam. It draws surface water and serves 1,454 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 7,966 systems serving 1,001–3,300 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2021–Dec 2023, was 1.7 ppb, below the 15 ppb action level that applied. That’s higher than 65% 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. WA5315400.
4 home internet providers serve Coulee Dam
99% of 518 addresses can get 100/20 Mbps; 0% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 99% | 1,000/35 |
| CenturyLink | DSL | 67% | 40/3 |
| Swift-Stream Internet | Fixed wireless | 65% | 40/6 |
| Ziply Fiber | Fixed wireless | 20% | 50/10 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Coulee Dam’s trash rules yet
Pickup rules, the dump and recycling in Coulee Dam.
Where your child goes to school
Public school districts and the school path by grade.
Coulee Dam is in Grand Coulee Dam School District.
C−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 Aug 2015; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 30, 2026.
Coulee Dam is in ZIP code 99116
ZIP codes where Coulee Dam residents live, with the share of the town in each.
| ZIP | Post office name | Share of Coulee Dam | ZIP’s residents in Coulee Dam |
|---|---|---|---|
| 99116 | Coulee Dam, WA | 100% | 82% |
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 Coulee Dam
Who supplies Coulee Dam’s drinking water, and has it had violations?
Coulee Dam Water Dept (EPA ID WA5315400). 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 1.7 ppb (Jan 2021–Dec 2023), against a 15 ppb action level.
Who provides electricity in Coulee Dam?
City of Coulee Dam (City of Coulee Dam - (WA)), a municipal utility.
What internet providers serve Coulee Dam?
Spectrum, CenturyLink, Swift-Stream Internet, Ziply Fiber (FCC, as of December 2025).
What ZIP codes are in Coulee Dam?
99116. Census 2020 ZIP Code Tabulation Areas.
What school district is Coulee Dam in?
Grand Coulee Dam School District.
How do I register to vote in Coulee Dam?
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 Okanogan 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.