| Pesticide | Sample 01 | Sample 02 | Sample 03 | Sample 04 | Sample 05 |
| Sampling date | Jul/05 | Ago/05 | Out/05 | Jan/06 | Abr/06 |
| DEA | ND | ND | ND | 0.09 | 0.2 |
| Atrazine | ND | ND | ND | 0.06 | 0.2 |
| Metolachlor | ND | ND | ND | 0.02 | ND |
| Chlorpyrifos | ND | ND | ND | 0.02 | ND |
| Endosulfan sulfate | 0.27 | 0.05 | ND | 0.1 | ND |
| Lambda cyhalothrin | 0.3 | ND | ND | ND | ND |
| Endrin | 0.23 | ND | ND | ND | ND |