| Value | Category | Cases | |
|---|---|---|---|
| 1 | Low free chlorine: < 0.2 mg/mL | 1112 |
83.5%
|
| 2 | Moderate free chlorine: 0.2 to 0.5 mg/mL | 146 |
11%
|
| 3 | High free chlorine : > 0.5 mg/mL | 74 |
5.6%
|
| Sysmiss | 3356 |