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! Year !! Month and date !! Category !! Details
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| 1955 || || {{w|Water pollution}} || Sewage and industrial wastes from the {{w|Najafgarh drain}} causes cause a famous {{w|jaundice}} episode in Delhi. The Najafgarh drain comes to be known as "sorrow of Delhi"<ref>{{cite book |last1=Agarwal |first1=S. K. |title=Water Pollution |url=https://books.google.com.ar/books?id=VRl-24p3ju8C&pg=PA81&lpg=PA81&dq=%22pollution%22+%22delhi%22+%22in+1950..1969%22&source=bl&ots=GBwERB4Xbx&sig=ACfU3U3yFlFqPOOwPTxAV1K0Rb7e7cvnkg&hl=en&sa=X&ved=2ahUKEwjf2JD4oIziAhUOHbkGHWkIAfwQ6AEwCnoECAkQAQ#v=onepage&q=%22pollution%22%20%22delhi%22%20%22in%201950..1969%22&f=false}}</ref>
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| 1974 || || Policy || The Central Pollution Control Board is set up under the Water Act.<ref name="Pollution in Delhi : A Chronic Problem"/>
