Question

What is the main indicator of water pollution?

Answer 1

1.Bad taste of water
2.The water having suspended impurities
3.The water having colours
4.The water having microorganisms in it

Answer 2

E. Coliform bacteria is present in polluted water. The presence of E. Coliform bacteria show that there are pollutants in water and the water is not safe for drinking.

Henceforth, E. Coliform is a major indicator of impure water.

Answer on basis of Class 10 NCERT