The problem of high ammonical nitrogen concentration in the Yamuna during winter is not new. Between December and March each year, treatment plants have to be either shut down or work at reduced capacity several times as the system can handle ammonia only up to 1 part per million (ppm).
Delhi Minister of Water, Saurabh Bharadwaj, officials from the central government, UNICEF, and World Health Organisation (WHO) teams visited the Sonia Vihar and Wazirabad Water Treatment Plants to see their operations.A meeting was held between .