When you say you find bugs in water what do you mean and why do you do it?

Question: When you say you find bugs in water what do you mean and why do you do it?
- Keywords:
  bug,
  water
Asked by L.B_1107 to Chinna on 14 Nov 2018.
- Chinna answered on 14 Nov 2018:
  
  What I mean is that we test the water to know whether it is pure or contaminated with any bacteria. We do it to know whether the water is drinkable or polluted.

Question: When you say you find bugs in water what do you mean and why do you do it?