Photo: Crimsonedge34 · CC BY-SA 3.0Living in Hollis, OK: what to set up and who to call
The Hollis water system reported one health-based violation to EPA in the last five years: nitrate-nitrite, beginning Jul 2024. Power in Hollis comes from Harmon Electric Assn, a cooperative utility rather than a private company.
I’m new in town
What to set up in Hollis, 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 Hollis.
Power comes from Harmon Electric Assn
Harmon Electric Assn (Harmon Electric Assn Inc), a cooperative utility, serves all of Hollis.
Start or move service: harmonelectric.com · (580) 688-3342
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Hollis water system
The Hollis water system supplies almost all of Hollis. It draws ground water and serves 2,264 people in all.
1 health-based violation reported to EPA in the five years to October 2026: nitrate-nitrite, beginning Jul 2024. 78% of the 7,966 systems serving 1,001–3,300 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2022–Dec 2024, was 2.6 ppb, below the 15 ppb action level that applied. That’s higher than 79% 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. OK2002901.
3 home internet providers serve Hollis
3% of 1,037 addresses can get 100/20 Mbps; 0% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Pioneer Telephone Cooperative | DSL | 96% | 46/7 |
| Southwest Oklahoma Telephone Company | Fixed wireless | 100% | 25/3 |
| T-Mobile | Fixed wireless | 12% | 100/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Hollis’ trash rules yet
Pickup rules, the dump and recycling in Hollis.
Where your child goes to school
Public school districts and the school path by grade.
Hollis is in Hollis Public Schools.
BSchool 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 Dec 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 12, 2025.
Hollis is in ZIP code 73550
ZIP codes where Hollis residents live, with the share of the town in each.
| ZIP | Post office name | Share of Hollis | ZIP’s residents in Hollis |
|---|---|---|---|
| 73550 | Hollis, OK | 100% | 84% |
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 Hollis
Who supplies Hollis’ drinking water, and has it had violations?
The Hollis water system (EPA ID OK2002901). It reported 1 health-based violation to EPA in the five years to October 2026: nitrate-nitrite. 78% of systems its size had none. Its latest lead 90th percentile was 2.6 ppb (Jan 2022–Dec 2024), against a 15 ppb action level.
Who provides electricity in Hollis?
Harmon Electric Assn (Harmon Electric Assn Inc), a cooperative utility.
What internet providers serve Hollis?
Pioneer Telephone Cooperative, Southwest Oklahoma Telephone Company, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Hollis?
73550. Census 2020 ZIP Code Tabulation Areas.
What school district is Hollis in?
Hollis Public Schools.
How do I register to vote in Hollis?
In Oklahoma you can register online until 25 days before Election Day, in person until 25 days before Election Day, or by mail (received 25 days before). Elections here are run by the Secretary, Harmon County Election Board. Check your registration at okvoterportal.okelections.us.
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 12, 2025 (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.