Domestic and industrial sewage generated within the NCT of Delhi
is the main source of pollution of the river Yamuna during its
passage through the NCT. Despite over ten years of efforts and
expenditure of Rs. 872 crore since 19941 on establishment of
sewage treatment infrastructure for treatment of domestic and
industrial sewage before its release into the river, the quality of
water at the point where the river leaves Delhi has deteriorated
drastically with large amounts of untreated sewage still falling into
the river.