| Area | Sub-division | Sample fall (%) | |
| Pre | Post | ||
| 1 | Alkaline earths exceed alkalies | 80% | 77% |
| 2 | Alkalies exceed alkaline earths | 20% | 23% |
| 3 | Weak acids exceed strong acids | 87% | 79% |
| 4 | Strong acids exceed weak acids | 13% | 21% |
| 5 | Carbonate hardness (secondary alkalinity) exceeds 50% | 70% | 64% |
| 6 | Non-carbonate hardness (secondary salinity) exceeds 50% | 0% | 0% |
| 7 | Non-carbonate alkali (primary salinity) exceeds 50% | 3% | 6% |
| 8 | Carbonate alkali (primary alkalinity) exceeds 50% | 0% | 0% |
| 9 | No one cation-anion pair exceeds 50% | 27% | 30% |