County · Arkansas
Johnson County, Arkansas: drinking water records
This overview covers 8 ZIP codes and 10 community water systems in Johnson County. It also stands in for 0 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| East Johnson Co Water Assn AR0000772 | 5,200 | 120 | 0 | 1 | 1 ppb |
| Clarksville Connected Utilities AR0000289 | 9,410 | 120 | 0 | 0 | 2 ppb |
| Horsehead Water Association AR0000617 | 5,792 | 120 | 0 | 0 | 1 ppb |
| Coal Hill Waterworks AR0000290 | 1,372 | 0 | 0 | 3 | 2 ppb |
| Hartman Waterworks AR0000286 | 947 | 120 | 0 | 0 | 2 ppb |
| Watalula Water Ass0ciation AR0000606 | 2,278 | 0 | 0 | 0 | 8 ppb |
| Knoxville Waterworks AR0000287 | 2,087 | 0 | 0 | 0 | 1 ppb |
| Lamar Waterworks AR0000288 | 1,885 | 0 | 0 | 0 | 1 ppb |
| Ludwig Water Association AR0000292 | 1,610 | 0 | 0 | 0 | 1 ppb |
| Spadra-Goose Camp Water Assoc AR0000293 | 517 | 0 | 0 | 0 | 1 ppb |
ZIP reports in Johnson County
No ZIP report in this county is published yet.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.