Living in Ocosta, WA: what to set up and who to call
Ocosta has no town government of its own, so Grays Harbor County runs its elections and most services, and its children attend Ocosta School District. Ocosta Mobile Home Park LLC has a clean five-year EPA record, but its latest lead result, 6.7 ppb, was higher than 93% of similar systems’ (the action level is 15).
I’m new in town
What to set up in Ocosta, 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 Ocosta.
Power comes from PUD No 1 of Grays Harbor County
PUD No 1 of Grays Harbor County (PUD No 1 of Grays Harbor County), a political subdivision utility, serves all of Ocosta. Its homes paid an average of 12.7¢ per kWh in 2025, about $133 a month (its average across Washington).
Start or move service: ghpud.org · (360) 532-4220
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Ocosta Mobile Home Park LLC
Ocosta Mobile Home Park LLC supplies Ocosta: about 5% of residents live in its service area. About 95% 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 26 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 2019–Dec 2021, was 6.7 ppb, below the 15 ppb action level that applied. That’s higher than 93% 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. WA5396887.
4 home internet providers serve Ocosta
95% of 260 addresses can get 100/20 Mbps; 0% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable | 92% | 1,200/35 |
| CenturyLink | DSL | 53% | 40/3 |
| T-Mobile | Fixed wireless | 56% | 100/20 |
| Verizon | Fixed wireless | 16% | 25/6 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Ocosta’s trash rules yet
Pickup rules, the dump and recycling in Ocosta.
Where your child goes to school
Public school districts and the school path by grade.
Ocosta is in Ocosta 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
Ocosta is unincorporated, so Grays Harbor County is the local government.
Election office: FVAP local election office directory, updated Sep 2024; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 30, 2026.
Ocosta is in ZIP code 98520
ZIP codes where Ocosta residents live, with the share of the town in each.
| ZIP | Post office name | Share of Ocosta | ZIP’s residents in Ocosta |
|---|---|---|---|
| 98520 | Aberdeen, WA | 100% | 2% |
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 Ocosta
Who supplies Ocosta’s drinking water, and has it had violations?
Ocosta Mobile Home Park LLC (EPA ID WA5396887). 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 6.7 ppb (Jan 2019–Dec 2021), against a 15 ppb action level.
Who provides electricity in Ocosta?
PUD No 1 of Grays Harbor County (PUD No 1 of Grays Harbor County), a political subdivision utility. Its homes paid about 12.7¢ per kWh in 2025 (EIA).
What internet providers serve Ocosta?
Xfinity, CenturyLink, T-Mobile, Verizon (FCC, as of December 2025).
What ZIP codes are in Ocosta?
98520. Census 2020 ZIP Code Tabulation Areas.
What school district is Ocosta in?
Ocosta School District.
How do I register to vote in Ocosta?
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 Grays Harbor 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.