Water quality by county
in Alabama
EPA sampled public water systems across Alabama for PFAS under its UCMR 5 programme. Of the 67 counties, 27 have a reading above a federal limit and 0 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 |
|---|---|---|---|
| Jefferson County | 664,744 | 15× | PFOS · 59.4 ng/L |
| DeKalb County | 73,122 | 13× | PFOA · 52.5 ng/L |
| Etowah County | 103,207 | 8.1× | PFOS · 32.4 ng/L |
| Mobile County | 412,339 | 7.8× | PFOA · 31.4 ng/L |
| Shelby County | 235,969 | 7.8× | PFOS · 31 ng/L |
| Colbert County | 58,785 | 7.4× | PFOS · 29.5 ng/L |
| Elmore County | 91,042 | 7.3× | PFOS · 29 ng/L |
| Chilton County | 47,262 | 7.0× | PFOS · 28 ng/L |
| Autauga County | 61,464 | 5.7× | PFOS · 22.8 ng/L |
| Lauderdale County | 97,502 | 5.6× | PFOS · 22.3 ng/L |
| Clarke County | 22,142 | 4.8× | PFOS · 19 ng/L |
| Wilcox County | 9,865 | 4.0× | PFOS · 16.2 ng/L |
| Lee County | 187,847 | 4.0× | PFOA · 16 ng/L |
| Calhoun County | 116,427 | 3.8× | PFOS · 15.3 ng/L |
| Talladega County | 81,375 | 3.8× | PFOS · 15.1 ng/L |
| Baldwin County | 261,608 | 3.8× | PFOS · 15 ng/L |
| Marengo County | 18,512 | 3.8× | PFOS · 15 ng/L |
| St. Clair County | 96,927 | 3.8× | PFOA · 15 ng/L |
| Limestone County | 118,942 | 3.2× | PFOS · 12.9 ng/L |
| Marshall County | 102,156 | 2.8× | PFOA · 11 ng/L |
| Madison County | 423,355 | 2.3× | PFOS · 9 ng/L |
| Russell County | 58,837 | 1.9× | PFOA · 7.5 ng/L |
| Bullock County | 9,901 | 1.4× | PFOA · 5.8 ng/L |
| Jackson County | 53,780 | 1.4× | PFOS · 5.6 ng/L |
| Macon County | 18,159 | 1.4× | PFOA · 5.5 ng/L |
| Cherokee County | 26,138 | 1.3× | PFOA · 5.2 ng/L |
| Chambers County | 33,813 | 1.1× | PFOS · 4.2 ng/L |
| Lamar County | 13,543 | under the limit | PFHxS · 5.9 ng/L |
| Barbour County | 24,358 | under the limit | — |
| Bibb County | 22,258 | under the limit | — |
| Blount County | 60,163 | under the limit | — |
| Butler County | 18,256 | under the limit | — |
| Choctaw County | 12,052 | under the limit | — |
| Clay County | 14,239 | under the limit | — |
| Cleburne County | 15,905 | under the limit | — |
| Coffee County | 56,358 | under the limit | — |
| Conecuh County | 11,109 | under the limit | — |
| Coosa County | 10,291 | under the limit | — |
| Covington County | 37,748 | under the limit | — |
| Crenshaw County | 13,114 | under the limit | — |
| Cullman County | 92,604 | under the limit | — |
| Dale County | 50,067 | under the limit | — |
| Dallas County | 35,545 | under the limit | — |
| Escambia County | 36,630 | under the limit | — |
| Fayette County | 15,863 | under the limit | — |
| Franklin County | 31,874 | under the limit | — |
| Geneva County | 27,259 | under the limit | — |
| Greene County | 7,127 | under the limit | — |
| Hale County | 15,116 | under the limit | — |
| Henry County | 18,141 | under the limit | — |
| Houston County | 109,366 | under the limit | — |
| Lawrence County | 33,567 | under the limit | — |
| Lowndes County | 9,485 | under the limit | — |
| Marion County | 29,323 | under the limit | — |
| Monroe County | 19,057 | under the limit | — |
| Montgomery County | 225,894 | under the limit | — |
| Morgan County | 126,084 | under the limit | — |
| Perry County | 7,719 | under the limit | — |
| Pickens County | 18,508 | under the limit | — |
| Pike County | 33,124 | under the limit | — |
| Randolph County | 23,067 | under the limit | — |
| Sumter County | 11,607 | under the limit | — |
| Tallapoosa County | 40,699 | under the limit | — |
| Tuscaloosa County | 241,212 | under the limit | — |
| Walker County | 65,260 | under the limit | — |
| Washington County | 15,018 | under the limit | — |
| Winston County | 23,869 | under the limit | — |