The students made speeches, and organised a rally brandishing placards that appealed to the public to stop polluting the river with polythene bags and other toxic waste.
"What we saw made us feel terrible. The bed of the river was strewn with garbage. God idols made of toxic material were everywhere to be seen, so were the polythenes. Glass strands were all over the bed, and the water was dark and dirty," said Neha Sharma, a student.
"At a time, at least five people were mindlessly throwing polythene bags into the water. This is shameful," said Prachi, another student.
For around two hours, the students tried to persuade anyone who was found indulging in an irresponsible activity and vowing to be careful about environment themselves.