| SAR values | Sodium hazard of water | Water sample | Comments | |
| Wet season | Dry season |
| ||
| 1 - 9 | Low | 0.034 - 0.289 | 0.193 - 0.745 | Use with caution on sodium sensitive crops |
| 10 - 17 | Medium |
|
| Amendments (eg gypsum) and leaching needed |
| 18 - 25 | High |
|
| Generally unsuitable for continuous use |
| >26 | Very high |
|
| Generally unsuitable for use |