Question

why is the coliformbacteria chosen to indicate the level of pollution in ganga? mention two major factors due to which the ganga has become polluted ?

Answer 1

The most common bacteria of coliform group is escherichia coli, commonly known as E coli, which is an indicator microorganism for other pathogens that may be present in feces. The presence of fecal coliform in aquatic environment indicates that the water has been contaminated with the fecal material of man or animals. When its levels are high, there is an elevated risk of waterborne diseases.