Locations
| Name | Sites | Samples |
|---|---|---|
| Jeff Davis County | 3 | 25 |
| Jefferson County | 1 | 1 |
| Jefferson County | 4 | 7 |
| Jefferson County | 1 | 1 |
| Jefferson County | 3 | 14 |
| Jefferson County | 1 | 2 |
| Jefferson Parish | 12 | 48 |
| Jim Wells County | 1 | 13 |
| Johnson County | 3 | 8 |
| Johnson County | 2 | 3 |
| Jones County | 1 | 4 |
| Jones County | 1 | 2 |
| Jones County | 1 | 5 |
| Jones County | 1 | 1 |
| Josephine County | 2 | 7 |
| Kandiyohi County | 2 | 5 |
| Kazakhstan | 1 | 3 |
| Kearny County | 1 | 4 |
| Keith County | 2 | 3 |
| Kemper County | 4 | 32 |
| Kendall County | 2 | 6 |
| Kenedy County | 1 | 6 |
| Kent County | 7 | 38 |
| Kenya | 22 | 335 |
| Kerr County | 5 | 73 |
| Kershaw County | 1 | 1 |
| Kimble County | 5 | 65 |
| King William County | 2 | 5 |
| Kinney County | 1 | 2 |
| Kiowa County | 1 | 3 |