Dissolved oxygen zero in Yamuna in Delhi since 2015: Report
The level of dissolved oxygen has remained zero since 2015 in most parts of Yamuna river in Delhi, as per a report. The level of dissolved oxygen should be a minimum of 4 mg/litre. Further, as per Delhi Pollution Control Committee's data, the quality of water in most stretches has deteriorated due to an increase in the inflow of sewage.n