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The Delhi Jal Board (DJB) has initiated a series of steps to restore the operations of two of the Capital’s largest water treatment plants after ammonia levels in the Yamuna rose. Ammonia levels at Wazirabad barrage, which feeds the Wazirabad and Chandrawal water treatment plants, were 8.1ppm on 3rd April night, 6ppm on 4th April morning and 2.5ppm on evening respectively.Ammonia is indicative of high industrial load or sewage in water. Long-term consumption of water with a high concentration of ammonia can cause poisoning and damage human organs.