Water quality for ZIP code 74631
ZIP 74631 covers Blackwell in Kay County, Oklahoma, one of 7 ZIP codes in the county. 14 active public water systems serve the county; 11 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Kay County
11 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Kay County Rural Water District 7 |
920 | 1 | 3.2 mi | |
| Tonkawa |
3,299 | 5 | 8.2 mi | |
| Braman |
244 | 2 | 9.2 mi | |
| Ponca City Mun Water |
27,155 | 1 | 12.9 mi | |
| Kay CO Rwd #3 |
1,000 | 0 | 13.1 mi | |
| Kay County Rwd #2 |
50 | 2 | 15.5 mi | |
| Kay CO Rwd #5 (dale Water Corp) |
765 | 4 | 16.0 mi | |
| Newkirk |
2,243 | 1 | 16.3 mi | |
| Kay CO Rwd #1 |
1,765 | 2 | 18.4 mi | |
| Kaw City Water Authority |
372 | 1 | 25.6 mi | |
| Kay Electric Cooperative |
2 | 0 | — |
Non-community systems in Kay County (2: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Hideaway RV Park Tonkawa |
27 | 0 | 0 | |
|
Arbuckle Mountain Fried Pies Tonkawa |
50 | 2 | 1 |
About this data
Water systems are matched to Kay County, the county this ZIP code lies in, nearest to the ZIP code's centre first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Oklahoma records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.