In a water treatment plant, you have been told to check the fecal coliform levels. Which of the following options gives the CORRECT reason behind monitoring these levels?
1
They cause diseases in humans
2
The pathogens are relatively scarce in water, making them difficult to monitor directly
3
There is a correlation between fecal coliform counts and the level of nitrites in the water
4
There is a correlation between fecal coliform counts and the probability of contracting a disease from water
5
Question Not Attempted