| Water delivery indicator | Performance class | ||
| Good | Fair | Poor | |
| Adequacy (PA) | 0.90 - 1.00 | 0.80 - 0.89 | <0.80 |
| Water delivery efficiency (PF) | 0.85 - 1.00 | 0.70 - 0.84 | <0.70 |
| Equity (PE) | 0.00 - 0.10 | 0.11 - 0.25 | >0.25 |
| Dependability (PD) | 0.00 - 0.10 | 0.11 - 0.20 | >0.20 |
| Overall performance indicator (OPI) | 0.89–1.00 | 0.76 - 0.89 | <0.76 |