| State | 2010 | 2005 | 2015 | ||||||||
| Census Data | Violations | TTHM | Violations | TTHM | |||||||
| Population | Income | Systems | Total | TTHM | [ppb] | Total | TTHM | [ppb] | % Change | ||
| AL | Alabama | 4,779,736 | $40,474 | 199 | 377 | 10 | 38.9 | 587 | 40 | 61.0 | 56.8% |
| AR | Arkansas | 2,915,918 | $38,307 | 622 | 804 | 83 | 41.3 | 620 | 42 | 76.0 | 84.0% |
| FL | Florida | 18,801,310 | $44,409 | 1695 | 1976 | 9 | 18.0 | 2407 | 141 | 71.0 | 294.4% |
| GA | Georgia | 9,687,653 | $46,430 | 1469 | 1995 | 15 | 44.0 | 2600 | 15 | 67.0 | 52.3% |
| KY | Kentucky | 4,339,367 | $40,062 | 668 | 643 | 107 | 46.0 | 898 | 22 | 75.0 | 63.0% |
| LA | Louisiana | 4,533,372 | $42,505 | 630 | 779 | 344 | 26.0 | 1596 | 169 | 43.0 | 65.4% |
| MS | Mississippi | 2,967,297 | $36,851 | 356 | 863 | 0 | 20.8 | 123 | 4 | 60.0 | 189.2% |
| NC | N. Carolina | 9,535,483 | $43,326 | 5211 | 10,437 | 354 | 47.0 | 3636 | 103 | 85.0 | 80.9% |
| OK | Oklahoma | 3,751,351 | $42,072 | 2519 | 1905 | 634 | 45.0 | 2393 | 367 | 58.0 | 28.9% |
| SC | S. Carolina | 4,625,364 | $42,018 | 240 | 365 | 10 | 43.0 | 170 | 8 | 76.0 | 76.7% |
| TN | Tennessee | 6,346,105 | $41,461 | 280 | 741 | 24 | 38.0 | 721 | 3 | 75.1 | 97.6% |
| TX | Texas | 25,145,561 | $48,615 | 5442 | 4300 | 923 | 31.0 | 10,541 | 320 | 69.2 | 123.2% |
| VA | Virginia | 8,001,024 | $60,674 | 2282 | 3053 | 71 | 29.0 | 2530 | 11 | 75.0 | 158.6% |
| WV | W. Virginia | 1,852,994 | $38,218 | 330 | 3852 | 121 | 38.0 | 307 | 10 | 56.1 | 47.6% |