| Sampling dates | Sampling sites | THMs (Mg/L) |
| 02/25/11 | CDT | 0.1101 |
| 03/11/11 | CDT | 0.0922 |
| 03/25/11 | CDT | 0.1008 |
| 04/08/11 | CDT | 0.0913 |
| 04/26/11 | CDT | 0.0935 |
| 05/20/11 | CDT | 0.0922 |
| 07/01/11 | CDT | 0.0907 |
| 07/29/11 | CDT | 0.0898 |
| 08/12/11 | CDT | 0.0854 |
| 10/07/11 | CDT | 0.0974 |
| 02/25/11 | Vázquez | 0.0967 |
| 02/25/11 | Piñas | 0.0901 |
| 03/25/11 | CWTP | 0.0869 |
| 02/25/11 | Río Hondo | 0.0901 |