| Sampling | Mean of MNPa/100 | |
| Total Coliforms | E. coli Presence (+)/Absence (−) | |
| 1 | 49 | + |
| 2 | 52 | + |
| 3 | 23 | + |
| 4 | 994 | + |
| 5 | 36 | + |
| 6 | 367 | + |
| 7 | 36 | + |