Water quality by county
in Arkansas
EPA sampled public water systems across Arkansas for PFAS under its UCMR 5 programme. Of the 75 counties, 1 have a reading above a federal limit and 6 have not been sampled at all — which is not a clean result, only an absence of one. Each county below shows what was found, at what concentration, and at which utility.
| county | Population | Worst result | Compound |
|---|---|---|---|
| Yell County | 20,134 | 1.1× | PFOS · 4.4 ng/L |
| Arkansas County | 16,050 | under the limit | — |
| Ashley County | 17,984 | under the limit | — |
| Baxter County | 43,007 | under the limit | — |
| Benton County | 321,566 | under the limit | — |
| Boone County | 38,636 | under the limit | — |
| Bradley County | 9,935 | under the limit | — |
| Calhoun County | 4,690 | not sampled | — |
| Carroll County | 28,968 | under the limit | — |
| Chicot County | 9,272 | not sampled | — |
| Clark County | 20,920 | under the limit | — |
| Clay County | 14,112 | under the limit | — |
| Cleburne County | 25,646 | under the limit | — |
| Cleveland County | 7,367 | under the limit | — |
| Columbia County | 22,024 | under the limit | — |
| Conway County | 21,422 | under the limit | — |
| Craighead County | 115,852 | under the limit | — |
| Crawford County | 62,258 | under the limit | — |
| Crittenden County | 46,633 | under the limit | — |
| Cross County | 16,194 | under the limit | — |
| Dallas County | 6,076 | under the limit | — |
| Desha County | 10,321 | under the limit | — |
| Drew County | 16,935 | under the limit | — |
| Faulkner County | 131,611 | under the limit | — |
| Franklin County | 17,586 | under the limit | — |
| Fulton County | 12,546 | under the limit | — |
| Garland County | 99,902 | under the limit | — |
| Grant County | 18,546 | under the limit | — |
| Greene County | 46,928 | under the limit | — |
| Hempstead County | 19,105 | under the limit | — |
| Hot Spring County | 33,313 | under the limit | — |
| Howard County | 12,387 | under the limit | — |
| Independence County | 38,345 | under the limit | — |
| Izard County | 14,291 | under the limit | — |
| Jackson County | 16,673 | under the limit | — |
| Jefferson County | 63,672 | under the limit | — |
| Johnson County | 26,172 | under the limit | — |
| Lafayette County | 6,015 | not sampled | — |
| Lawrence County | 16,305 | under the limit | — |
| Lee County | 8,104 | under the limit | — |
| Lincoln County | 12,868 | under the limit | — |
| Little River County | 11,626 | under the limit | — |
| Logan County | 21,457 | under the limit | — |
| Lonoke County | 76,389 | under the limit | — |
| Madison County | 17,865 | under the limit | — |
| Marion County | 17,593 | under the limit | — |
| Miller County | 41,958 | under the limit | — |
| Mississippi County | 38,095 | under the limit | — |
| Monroe County | 6,415 | under the limit | — |
| Montgomery County | 8,510 | not sampled | — |
| Nevada County | 8,004 | under the limit | — |
| Newton County | 7,026 | under the limit | — |
| Ouachita County | 21,684 | under the limit | — |
| Perry County | 10,251 | not sampled | — |
| Phillips County | 14,661 | under the limit | — |
| Pike County | 10,027 | not sampled | — |
| Poinsett County | 22,300 | under the limit | — |
| Polk County | 19,434 | under the limit | — |
| Pope County | 64,829 | under the limit | — |
| Prairie County | 7,935 | under the limit | — |
| Pulaski County | 401,209 | under the limit | — |
| Randolph County | 19,040 | under the limit | — |
| Saline County | 131,252 | under the limit | — |
| Scott County | 9,837 | under the limit | — |
| Searcy County | 7,836 | under the limit | — |
| Sebastian County | 130,035 | under the limit | — |
| Sevier County | 15,735 | under the limit | — |
| Sharp County | 18,130 | under the limit | — |
| St. Francis County | 21,822 | under the limit | — |
| Stone County | 12,785 | under the limit | — |
| Union County | 37,008 | under the limit | — |
| Van Buren County | 16,152 | under the limit | — |
| Washington County | 266,184 | under the limit | — |
| White County | 79,091 | under the limit | — |
| Woodruff County | 5,808 | under the limit | — |