The scientific parameters of class B River, in a river that is fit for bathing, the fecal coliform count should be less than 500 per 100 ml, biochecmical oxygen demand, or BOD, should be less than 3 mg per litre and dissolved oxygen should be more than 5 mg per litre. For a river to meet drinking standards, fecal coliform count should be zero.
Today, raw sewage amounting to 350 million litres per day flows into Ganga when infrastructure is in place to treat only 102 MLD, and two units are non-functional. The technology used is the same as which failed in the first phase. We do regular monitoring in our laboratory. At Tulsi ghat, which is upstream and where we are sitting, fecal coliform count is 110,000 per 100 ml when it should be under 500, while BOD is 9-10 mg per litre. Dissolved oxygen is not a problem. Today, 33 drains empty their raw sewage into Ganga. The sewage treatment plants is a redundant process, also because they do not remove fecal coliform bacteria. Downstream, at Varuna confluence, the fecal coliform count is 60 million per 100 ml. However, people come here and claim Ganga is looking cleaner than before. I agree that nobody has a magical wand, but this was the topmost commitment!