| Identification | Identification Type of sampling area |
| 1 | Secondary Supply Zone―Santana River |
| 2 | Industry/Food trading |
| 3 | Industry/Food trading |
| 4 | Industry/Food trading |
| 5 | Rural area―Irrigation water and livestock |
| 6 | School |
| 7 | Rural area―Irrigation water and livestock |
| 8 | Industry/Food trading |
| 9 | School |
| 10 | Primary supply area―Palmeiras River |