172 public water systems in Arkansas were sampled in EPA's UCMR 5 programme (2023–2025); we show six PFAS and lithium. Read 2026-10-31.
1 of 172 systems had at least one sample above a 2024 federal limit; 51 had at least one PFAS found above the reporting level; 121 had none found above the reporting level.
A single sample above a 2024 limit is a measurement, not a violation. Compliance is judged on running yearly averages, and water systems have until 2029 to meet the limits. On 20 May 2026 EPA proposed giving qualifying systems until 2031 for PFOA and PFOS and removing the limits for PFHxS, PFNA and HFPO-DA; those proposals were not final when we last checked (5 Nov 2026). Counts are per system, not per person; population figures are available only for systems serving more than 25,000 people (about 1,367,707 people across those systems here). UCMR 5 was a one-time national monitoring programme (2023–2025). The results are a snapshot at the system's entry points or taps on the sample dates, not a continuous measurement and not a compliance record.
| System | People served | UCMR 5 result |
|---|---|---|
| Central Arkansas Water Central Arkansas Water | 368,455 | None detected (below the reporting level) |
Pages for these are being added in stages. The data for all 172 systems is in the public dataset.
| System | People served | UCMR 5 result |
|---|---|---|
| Fayetteville Waterworks Fayetteville Waterworks | 116,398 | None detected (below the reporting level) |
| Springdale Water Utilities Springdale Water Utilities | 100,795 | None detected (below the reporting level) |
| Fort Smith Water Utilities Fort Smith Water Utilities | 86,209 | None detected (below the reporting level) |
| Jonesboro Water System Jonesboro Water System | 81,888 | None detected (below the reporting level) |
| Rogers Water Utilities Rogers Water Utilities | 81,443 | None detected (below the reporting level) |
| Hot Springs Utilities Hot Springs Utilities | 75,343 | None detected (below the reporting level) |
| Conway Water System Conway Water System | 65,233 | None detected (below the reporting level) |
| Bentonville Water Utilities Bentonville Water Utilities | 51,250 | None detected (below the reporting level) |
| Texarkana Water Utilities Texarkana Water Utilities | 50,815 | None detected (below the reporting level) |
| Liberty Utilities Liberty Utilities | 43,438 | None detected (below the reporting level) |
| Bella Vista Poa Bella Vista Poa | 39,419 | None detected (below the reporting level) |
| Jacksonville Waterworks Jacksonville Waterworks | 32,875 | None detected (below the reporting level) |
| Paragould Light Water & Cable Paragould Light Water & Cable | 31,188 | None detected (below the reporting level) |
| Benton Waterworks Benton Waterworks | 30,681 | None detected (below the reporting level) |
| City Corporation City Corporation | 29,260 | None detected (below the reporting level) |
| Searcy Waterworks Searcy Waterworks | 28,196 | None detected (below the reporting level) |
| Cabot Waterworks Cabot Waterworks | 27,578 | None detected (below the reporting level) |
| Centerton Waterworks Centerton Waterworks | 27,243 | None detected (below the reporting level) |
| Forrest City Waterworks Forrest City Waterworks | — | None detected (below the reporting level) |
| Stuttgart Waterworks Stuttgart Waterworks | — | None detected (below the reporting level) |
| Hamburg Waterworks Hamburg Waterworks | — | None detected (below the reporting level) |
| Crossett Water Commission Crossett Water Commission | — | None detected (below the reporting level) |
| Mountain Home Waterworks Mountain Home Waterworks | — | None detected (below the reporting level) |
| Lakeview-Midway Public Water Authority Lakeview-Midway Public Water Authority | — | None detected (below the reporting level) |
| North East Public Water Auth North East Public Water Auth | — | None detected (below the reporting level) |