Water quality for ZIP code 72845
ZIP 72845 covers Knoxville in Johnson County, Arkansas, one of 8 ZIP codes in the county. 12 active public water systems serve the county; 7 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 Johnson County
9 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Lamar Waterworks |
1,885 | 1 | 5.8 mi | |
| East Johnson CO Water Assn |
5,200 | 1 | 7.6 mi | |
| Clarksville Connected Utilities |
9,410 | 0 | 8.8 mi | |
| Ludwig Water Association |
1,610 | 0 | 10.0 mi | |
| Spadra-Goose Camp Water Assoc |
517 | 1 | 10.1 mi | |
| Hartman Waterworks |
947 | 0 | 13.6 mi | |
| Horsehead Water Association |
5,792 | 2 | 15.4 mi | |
| Coal Hill Waterworks |
1,372 | 4 | 17.9 mi | |
| Watalula Water Ass0ciation |
2,278 | 0 | 27.3 mi |
Non-community systems in Johnson County (2: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Primo Wmsc0066 Clarksvill |
30 | 1 | 1 | |
|
Usfs Horsehead Bathhouse |
25 | 1 | 0 |
About this data
Water systems are matched to Johnson 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 Arkansas 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.