The water quality data is required to be analyzed and primarily average values of Biochemical Oxygen Demand (BOD) and Faecal Coliform (FC) need to be estimated. Then, based on the total score estimated for the parameters BOD (weightage- 70 %) and FC (Weightage- 30 %), the monitoring location is identified as ‘polluted’ location.

The draft rules. namely the Environment (Protection) Amendment Rules, 2018 were published in the Gazette of India, Extraordinary, as required under sub-rule (3) of rule 5 of the Environment (Protection) Rules,1986, vide notification of the Government of India in the Ministry of Environment. Forest and Climate Change vide number G.S.R.

The number of critically polluted stretches of the country's rivers has increased to 351 from 302 two years ago, and the number of critically polluted stretches has gone up to 45 from 34, according to this recent assessment released by the Central Pollution Control Board (CPCB).