Table 1. Mean and SD of viability (%) after exposure to chlorine and UV irradiation using microscopy.
| Number of Exposure time |
Duration of Exposure(min) |
Chlorine dose | Number of Exposure time | UV | |||
|---|---|---|---|---|---|---|---|
| 0.5 ppm | 2 ppm | 5 ppm | UV dose (mJ/cm2) |
Mean±SD | |||
| Cryptosporidium | |||||||
| 1 | 15 | 86±2 | 80±6 | 42±8 | 1 | 5.2 | 47±5 |
| 2 | 30 | 70±6 | 67±4 | 32±2 | 2 | 10.4 | 22±7 |
| 3 | 60 | 55±6 | 59±5 | 23±2 | 3 | 20.8 | 5±1 |
| 4 | 120 | 46±4 | 50±6 | 15±3 | 4 | 41.6 | 3±2 |
| 5 | 83.2 | 1±1 | |||||
| Giardia | |||||||
| 1 | 15 | 57±32 | 7±0 | 7±0 | 1 | 5.2 | 25±7 |
| 2 | 30 | 30±21 | 0±0 | 0±0 | 2 | 10.4 | 7±9 |
| 3 | 60 | 0±0 | 0±0 | 0±0 | 3 | 20.8 | 0±0 |
| 4 | 120 | 0±0 | 0±0 | 0±0 | 4 | 41.6 | 0±0 |
| 5 | 83.2 | 0±0 | |||||