| Physico-Chemical Characteristics of Raw and Treated Water at Water Treatment Plants (WTP) in Delhi - Part I (2006) | |||||||||
| Parameters | BIS Drinking Water Standards, Limit 1991 | Min./ Max. | Wazirabad WTP | Haiderpur WTP | Bhagirathi WTP | ||||
| Raw | Treated | Raw | Treated | Raw | Raw | Treated | |||
| PH | |||||||||
| Permissible-No. Relaxation | |||||||||
| Total Dissolved Solids (mg/l) | |||||||||
| Total Alkalinity (mg/l) | |||||||||
| Total Hardness (mg/l) | |||||||||
| Chloride (mg/l) | |||||||||
| Fluoride (mg/l) | |||||||||
| Boron (mg/l) | |||||||||
| Nitrate (mg/l) | |||||||||
