A day after high level of ammonia forced the closure of Wazirabad and Chandrawal treatment plants, 50 per cent water supply was restored from both the facilities that serve large parts of the capital, including Lutyens' zone.
Delhi Water Minister Kapil Mishra had visited the Wazirabad plant in the morning.
The plants had to be shut down on the evening of January 19 as level of ammonia touched 2.6 ppm (parts per million), much higher than the safe limit of 0.02 ppm.
"Presently, the ammonia content has also considerably reduced up to 1.0 mg/l and 50 per cent pumping has been restored from Wazirabad and Chandrawal plants. As and when the ammonia level decreases upto the acceptable limit pumping will be increased in a phased manner," a statement issued by Delhi Jal Board (DJB) said.
In fact, raw water quality is being continuously monitored at half an hour intervals in DJB's laboratories to check the ammonia levels.
The Delhi government took up the issue with Haryana government authorities and sought its intervention for taking necessary steps to prevent entry of pollutants in downstream Yamuna.
Delhi Chief Secretary K K Sharma has written a letter to his Haryana counterpart apprising him of the "deteriorating" water quality. The government has also assured the Delhi Jal Board of taking "corrective measures".
New Delhi Municipal Corporation area, North Delhi, North West Delhi, Central Delhi and parts of West and South Delhi are among the areas that did not receive treated water last evening.
Water tankers will be available at telephone nos, 29941825 (Sarita Vihar), 26100644 (R K Puram), 29234746, 29234747 (Grater Kailash I), 23814338, 23810930 (Chandrawal Water Emergency), 27304656 (Ashok Vihar Water Emergency), 27700789, 27700474 (Holambi Kalan), 25274679, 25275259, 25275260 (Paschim Vihar), and 1916, 23538495, 23527679 (Central Control Room).
