Joshi was leading a parliamentary committee of seven MPs which was on a visit to the industrial town to review the working of the effluent treatment plant along the Ganga here.
The panel held discussions with the locals, businessmen, tannery owners and professors of the Indian Institute of Technology.
Stating that Prime Minister Narendra Modi wants the entire river cleaned up, he said the central government was coordinating with the state government for a pollution-free Ganga. Suggestions have been sought from the state pollution control board, businessmen and tannery owners on how to check pollution.
About the findings of today's visit, he said the panel believes a 1.5 times bigger effluent treatment plant was required at the site of Jajmau bridge to stop the flow of sewage into the river.
The panel was shown black flags near Jajmau bridge by local Samajwadi Party MLA Irfan Solanki and his supporters who raised anti-BJP slogans.
Later, Solanki submitted a memorandum of demands to Joshi, the Lok Sabha MP from Kanpur, for the welfare of people associated with tanneries and leather industry.