| Sample Location | Fecal Coliform Bacteria | Non-Fecal Coliform Bacteria | ||
| March 2015 | June 2015 | March 2015 | June 2015 | |
| Grafton Spring Water (Bottle and Sachet) | 0 | 0 | 0 | 0 |
| Water Bowser | TNTC1 | TNTC | TNTC | TNTC |
| Jacky Body | 2 | 48 | 4 | 85 |
| Florence Carew Well | 23 | 72 | 12 | 88 |
| Tia River Intake Point | 82 | TNTC | 32 | TNTC |
| Water Works (Treated Water) | 3 | 20 | 6 | 12 |
| Senior Staff Quarters | 18 | 21 | 14 | 14 |
| Staff Common Room | 4 | 76 | 8 | 56 |
| Estate Quarters | 2 | 36 | 20 | 50 |
| Lungi Quarters | 2 | 66 | 34 | 22 |
| Winters SH | 18 | 96 | 20 | 91 |
| Florence Carew SH | 22 | TNTC | 3 | 16 |
| Matturi SH | 4 | 85 | 12 | 77 |
| Crown Agent Quarters | 12 | 79 | 6 | 45 |