A number of reports have appeared that show that the state of a number of rivers of India, including Hindon, Yamuna, Ganga and Cauvery has improved during the current lockdown due to Covid 19 crisis. That is indeed great news. At Kanpur and Varanasi there are reports that suggest the dissolved oxygen level has gone above 8 ppm and BOD level has gone down below 3 ppm at a number of places. While lack of industrial effluents entering the rivers due to closure of industrial units is a major reason, there are other reasons that has led to this situation, including above average winter rainfall, high snowfall now melting with onset of summer, reduction of irrigation water demand and also stoppage of sand mining along the rivers. The reduction of cultural activities including puja, bathing and cremations have also contributed to this situation.
The biggest lesson we can learn from this cleaner rivers after so many decades is that if our pollution control boards at the state and central level were doing their duty to ensure that no untreated effluents from the industries and also urban sewage enter the rivers, it is not that difficult to achieve cleaner rivers. But unfortunately there is no political will to achieve this simple and legally enforceable objective.