Arkansas
Johnson County drinking water quality
12 active public water systems serve 31,153 people in Johnson County. 5 are compliant, 7 had at least one EPA violation in the past three years, 0 are designated serious violators, and 1 carries a health flag.
Needs attention
Community water systems
10 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Clarksville Connected Utilities |
9,410 | 0 | 0 | |
|
Horsehead Water Association |
5,792 | 2 | 1 | |
|
East Johnson CO Water Assn |
5,200 | 1 | 0 | |
|
Watalula Water Ass0ciation |
2,278 | 0 | 0 | |
|
Knoxville Waterworks |
2,087 | 0 | 0 | |
|
Lamar Waterworks |
1,885 | 1 | 0 | |
|
Ludwig Water Association |
1,610 | 0 | 0 | |
|
Coal Hill Waterworks |
1,372 | 4 | 2 | |
|
Hartman Waterworks |
947 | 0 | 0 | |
|
Spadra-Goose Camp Water Assoc |
517 | 1 | 1 |
Non-community systems (2: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Primo Wmsc0066 Clarksvill |
30 | 1 | 1 | |
|
Usfs Horsehead Bathhouse |
25 | 1 | 0 |
Inactive systems (49, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
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.