Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Tyler County | 1 | 1 |
| Upshur County | 12 | 61 |
| Uvalde County | 13 | 102 |
| Val Verde County | 106 | 749 |
| Victoria County | 8 | 79 |
| Walker County | 1 | 6 |
| Washington County | 2 | 14 |
| Webb County | 12 | 112 |
| Wharton County | 3 | 8 |
| Willacy County | 4 | 14 |
| Williamson County | 19 | 229 |
| Wilson County | 2 | 6 |
| Winkler County | 1 | 3 |
| Wood County | 13 | 33 |
| Young County | 1 | 41 |
| Zapata County | 5 | 53 |
| Zavala County | 10 | 37 |
Sites
| Site Identifier | Name | Location | Samples |
|---|---|---|---|
| 41SY41 | Robert Griffin | TX | 1 |
| 41SY45 | Buddy Hancock | TX | 1 |
| 41SY92 | Tyson | TX | 4 |