Locations
| Name | Sites | Samples |
|---|---|---|
| Lee County | 21 | 272 |
| Lee County | 6 | 13 |
| Lee County | 2 | 6 |
| Lee County | 4 | 30 |
| Lenoir County | 1 | 1 |
| Leon County | 3 | 10 |
| Levy County | 16 | 81 |
| Lewis County | 4 | 30 |
| Lexington County | 6 | 36 |
| Liberty County | 3 | 25 |
| Liberty County | 58 | 267 |
| Liberty County | 3 | 14 |
| Limestone County | 1 | 5 |
| Lincoln County | 1 | 3 |
| Lincoln County | 1 | 5 |
| Lincoln County | 3 | 12 |
| Lincoln County | 1 | 1 |
| Lincoln County | 4 | 23 |
| Lincoln County | 1 | 1 |
| Lincoln Parish | 1 | 11 |
| Linn County | 1 | 2 |
| Lipscomb County | 1 | 5 |
| Live Oak County | 7 | 40 |
| Livingston Parish | 5 | 8 |
| Llano County | 2 | 5 |
| Logan County | 2 | 4 |
| Logan County | 1 | 1 |
| Lonoke County | 2 | 22 |
| Loudon County | 6 | 23 |
| Loudoun County | 11 | 33 |