| C | Degree | Description |
| C1 | Low salinity water | Good |
| C2 | Moderate to saline water | Good for soil of medium permeability for most plants. |
| C3 | Medium to highly saline water | Satisfactory for plants, having a moderate salts tolerance on soils of moderate permeability with leaching. |
| C4 | Highly saline water | Satisfactory for salt tolerant crops on soils of good permeability with special leaching. |
| S | Degree | Description |
| S1 | Low sodium water | Good |
| S2 | Medium sodium water | Good for coarse grained permeability soils, unsatisfactory for highly clayey soil with low leaching. |
| S3 | Highly sodium water | Suitable only with good drainage, high leaching and organic matter addition some chemical additives. |
| S4 | Very highly sodium | Unsatisfactory. |