Indicator | Value range |
Fecal coliforms (Most probable number, MPN/L) | ≤900 |
Enteric pathogens | Not detected |
Mycobacterium tuberculosis | Not detected |
Disinfection contact time | ≥1.5 h (Chlorination) ≥0.5 h (Chlorine dioxide method) |
Total residual chlorine (mg/L) | ≥6.5 (Chlorination) ≥4.0 (Chlorine dioxide method) |