Living in Cromwell, OK: what to set up and who to call
Seminole Co. Rw&swmd #3 reported 17 health-based violations to EPA in the last five years: disinfection byproducts (TTHM) ×16, a lead and copper treatment requirement (Lead and Copper Rule Revisions). 77% of systems its size reported none. For emergencies, Cromwell is closest to Creek Nation Community Hospital, 11.3 miles away.
I’m new in town
What to set up in Cromwell, 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 Cromwell.
Power comes from OG&E
OG&E (Oklahoma Gas & Electric Co.), an investor-owned utility, serves all of Cromwell. Its homes paid an average of 12.5¢ per kWh in 2025, about $131 a month (its average across Oklahoma).
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Seminole Co. Rw&swmd #3
Seminole Co. Rw&swmd #3 supplies almost all of Cromwell. It buys treated surface water (EPA lists Okfuskee Co. RWD #2 as seller) and serves 337 people in all.
17 health-based violations reported to EPA in the five years to October 2026: disinfection byproducts (TTHM) ×16, a lead and copper treatment requirement (Lead and Copper Rule Revisions), the latest beginning Apr 2026. 77% of the 15,074 systems serving 101–500 people had none.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2026, was 0.5 ppb, below the 15 ppb action level that applied. The highest in five years was 2.2 ppb. That’s lower than 54% 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. OK3006703.
Which providers serve Cromwell
This card will list the home internet providers the FCC’s National Broadband Map shows in Cromwell, 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 Cromwell’s trash rules yet
Pickup rules, the dump and recycling in Cromwell.
Where your child goes to school
Public school districts and the school path by grade.
Cromwell is in Butner Public Schools.
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.
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.
Cromwell spans 2 ZIP codes
ZIP codes where Cromwell residents live, with the share of the town in each.
| ZIP | Post office name | Share of Cromwell | ZIP’s residents in Cromwell |
|---|---|---|---|
| 74837 | Cromwell, OK | 55% | 91% |
| 74859 | Okemah, OK | 45% | 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 Cromwell
Who supplies Cromwell’s drinking water, and has it had violations?
Seminole Co. Rw&swmd #3 (EPA ID OK3006703). It reported 17 health-based violations to EPA in the five years to October 2026: disinfection byproducts (TTHM) ×16, a lead and copper treatment requirement (Lead and Copper Rule Revisions). 77% of systems its size had none. Its latest lead 90th percentile was 0.5 ppb (Jan–Dec 2026), against a 15 ppb action level.
Who provides electricity in Cromwell?
OG&E (Oklahoma Gas & Electric Co.), an investor-owned utility. Its homes paid about 12.5¢ per kWh in 2025 (EIA).
What ZIP codes are in Cromwell?
74837 (55%), 74859 (45%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Cromwell in?
Butner Public Schools.
How do I register to vote in Cromwell?
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, Seminole 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): pending.