Two water treatment plants shut in Delhi as ammonia levels rise

Rising pollution level in water reservoirs is threatening to aggravate the water crisis in the Capital. Due to extremely high levels of ammonia in the raw water, the production of the Chandrawal and Wazirabad water treatment plants, supplying to central and north Delhi, NDMC areas and Delhi Cantt, was stopped resulting several parts of Delhi could face a water shortage.

“No need to panic as demand in the city was already low and there was water in reservoirs which would be used to augment supply,” said Delhi Jal Board.

Haiderpur plant production was down to 50% while Dwarka plant saw production dip to 85% and was expected to impact supply in parts of south and southwest Delhi. Out of the 900 million gallons per day of water that are treated in Delhi, the Wazirabad and Chandrawal plants account for about 220 MGD. Haiderpur was treating about 100 MGD against a capacity of 200 MGD.

“There was a leakage in the carrier lined channel that transport water from Haryana to Delhi. To mend this leak, supply in the CLC was reduced and diverted to the river course. As the river channel, which receives a huge quantity of untreated waste water which often ends up contaminating Delhi’s supply.” said Delhi Jal Board.

“Water treatment plant production will be suspended if there is a quantum of ammonia in raw water increases to 0.5 parts per million and beyond. It was 3ppm on Sunday morning and hence production at both plants was shut”, said the source. Last year Delhi Jal Board set up an ammonia neutralization plant also ineffective against the high level of ammonia content. Sources also said that the plant had actually never really worked after its trial period.

Haryana to release an additional 600 cusec of water as Delhi has already requested to dilute existing supply. So this Sunday part of Delhi will be affected as it may resume its operation later today.

Source: Times of India Photo: Express Photo Renuka Puri


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