What can be done to stop pollution in the Ganges river?

The main contributor to increasing pollution level in Ganga river is the sewage water which is disposed directly in to ganga without proper treatment.one f the best way to control pollution in ganga can be effective treatment of all the wastewater before they enter the holy river.Improvement in the funtioning of the sewage treatment plants could be a great help as most of the sewage treatment plants fail to meet their standards as described by Centre for pollution control board(CPCB0.Another possible method can be diversion of the water in drains in to various ponds where the sewage water gets treated before it enters the river.These ponds may be oxidation ponds,ponds with various microorganisms which can feed upon the waste in the sewage water to reduce the sewage load and ponds with aborbing plantations of pollution absorbing plants etc.