Photo: Aykleinman · Public domainLiving in Duncan, OK: what to set up and who to call
Duncan Public Utilities Authority reported 5 health-based violations to EPA in the last five years: organic carbon removal (total organic carbon) ×4, disinfection byproducts (TTHM). 83% of systems its size reported none. Duncan runs its own electric utility, City of Duncan.
I’m new in town
What to set up in Duncan, 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 Duncan.
Power comes from City of Duncan
City of Duncan (City of Duncan - (OK)), a municipal utility, serves 89.4% of Duncan residents.
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Duncan Public Utilities Authority
Duncan Public Utilities Authority supplies Duncan: about 42% of residents live in its service area. Stephens Co RWD #5 serves another 25%. Jefferson Co Cons RWD #1 serves another 9%. About 24% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws surface water and serves 23,000 people in all.
5 health-based violations reported to EPA in the five years to October 2026: organic carbon removal (total organic carbon) ×4, disinfection byproducts (TTHM), the latest beginning Oct 2024. 83% of the 3,525 systems serving 10,001–50,000 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2022–Dec 2024, was 0.0 ppb, below the 15 ppb action level that applied. Results below detection are reported as 0, so 0 doesn’t mean no lead at any tap.
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. OK1010809.
8 home internet providers serve Duncan
100% of 10,760 addresses can get 100/20 Mbps; 89% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Sparklight | Cable | 96% | 1,000/50 |
| Dobson Fiber | Fiber | 89% | 10,000/10,000 |
| AT&T | Fixed wireless, DSL | 54% | 25/3 |
| 360 Broadband | Fixed wireless | 99% | 400/50 |
| Nextlink | Fixed wireless | 88% | 500/100 |
| Verizon | Fixed wireless | 84% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
Waste Connections picks up trash in Duncan
Pickup days, the drop-off and recycling in Duncan, from the town’s own site.
We couldn’t find pickup days or drop-off hours. Check duncanok.gov →
From duncanok.gov, the town’s official site, checked Oct 23, 2026. Rules change: the town’s page is the last word. .
Where your child goes to school
Public school districts and the school path by grade.
Most of Duncan (54%) is in Duncan Public Schools; parts are in Marlow Public Schools (16%) and Bray-Doyle Public Schools (12%) and Empire Public Schools (11%) and Comanche Public Schools (7%).
B+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 2026; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Sep 12, 2025.
Duncan spans 2 ZIP codes
ZIP codes where Duncan residents live, with the share of the town in each.
| ZIP | Post office name | Share of Duncan | ZIP’s residents in Duncan |
|---|---|---|---|
| 73533 | Duncan, OK | 98% | 81% |
| 73055 | Marlow, OK | 2% | 4% |
A few homes fall in 73529. 73534, 73536 are P.O. box or single-organization ZIPs with no homes.
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 Duncan
Who supplies Duncan’s drinking water, and has it had violations?
Duncan Public Utilities Authority (EPA ID OK1010809). It reported 5 health-based violations to EPA in the five years to October 2026: organic carbon removal (total organic carbon) ×4, disinfection byproducts (TTHM). 83% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan 2022–Dec 2024), against a 15 ppb action level.
Who provides electricity in Duncan?
City of Duncan (City of Duncan - (OK)), a municipal utility.
What internet providers serve Duncan?
Sparklight, Dobson Fiber, AT&T, 360 Broadband, Nextlink, Verizon (FCC, as of December 2025).
What ZIP codes are in Duncan?
73533 (98%), 73055 (2%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Duncan in?
Duncan Public Schools. Parts of the city are in Marlow Public Schools and Bray-Doyle Public Schools and Empire Public Schools and Comanche Public Schools.
How do I register to vote in Duncan?
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, Stephens 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: Duncan’s own website (duncanok.gov), read Oct 23, 2026, pickup and drop-off facts extracted and checked against the page they came from.
- 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.