| Type of Water | Designation | SAR | Percentage (%) |
| RSC 1 > 0 | RSC = Carbonate Alkalinity-Ca-Mg > 0 | SAR > 9 | 9.8 |
| RSC2 > 0 | RSC = Carbonate Alkalinity-Ca-Mg > 0 | 3 < SAR < 9 | 3.9 |
| RSC 3 > 0 | RSC = Carbonate Alkalinity-Ca-Mg > 0 | SAR < 3 | 2.0 |
| RSC4 < 0 | RSC = Carbonate Alkalinity-Ca-Mg < 0 | SAR > 9 | 15.7 |
| RSC5 < 0 | RSC = Carbonate Alkalinity-Ca-Mg < 0 | 3 < SAR < 9 | 27.4 |
| RSC6 < 0 | RSC = Carbonate Alkalinity-Ca-Mg < 0 | SAR < 3 | 41.2 |