Microorganism | Chlorine concentration (mg/L) | Deactivation period (min) | Ct |
E. coli | 0.1 | 0.4 | 0.04 |
Poliovirus I | 1.0 | 1.7 | 1.7 |
Entamoeba histolytica cysts | 5.0 | 18 | 90 |
G. lamblia cysts | 1.0 | 50 | 50 |
2.0 | 40 | 80 | |
2.5 | 100 | 250 | |
G. muris cysts | 2.5 | 100 | 250 |