| Parameters | Min. (mg/l) | No. of well | % No. of well | Area and location |
| Nitrite | 0 | 3 | 2.1 | Wadi Noman P 17, 20 and Al-Omrah Z2 |
| Nitrate | 23 | 1 | 0.7 | Al-Jamoom B8 |
| Chloride | 25 | 1 | 0.7 | Wadi Noman P3 |
| Sulphate | 8.6 | 1 | 0.7 | Al-Shumaisi F1 |