76 of 150 ma­jor rivers 80%

Down to Earth - - COVER STORY -

in In­dia are pol­luted, with bi­o­log­i­cal oxy­gen de­mand (BOD) 10-30 mg/l. BOD safe for bathing is 3 mg/l 7,322 mil­lion litres of sewage from cities goes un­treated into the Ganga ev­ery day 500 mil­lion litres of in­dus­trial

dis­charge from 764 units flows into the Ganga ev­ery day of wa­ter sup­plied to house­holds is re­turned as waste­water

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