| RSC (meq/l) | Suitability |
| <1.25 | Suitable |
| 1.25 - 2.50 | Marginal |
| >2.50 | Unsuitable |
| MR |
|
| >50 | Suitable |
| <50 | Unsuitable |
| KR |
|
| >1.0 | Good |
| <1.0 | Not Good |