| Standard drinking water WHO. 2004 | AW | RW | Parameters |
| 30 | 2 | 0/141,844 | NO2 (mg/l) |
| 50 | 2.2 | 0/156,028 | NO3 (mg/l) |
| 5 | 4 | 0/283,688 | DO (mg/l) |
| 6/5 - 8/5 | 2.1 | 0/148,643 | pH |