Question

Name 2 factors which can be used to find whether river water has been contaminated ?

Answer 1

find weather there is extra green later on water

Answer 2

Contaminated water is a kind of water with impurities such as particles of soil , sand particles and micro organisms. These materials may make water contaminated by changing its

colour or producing unpleasant smell. Clean water is colourless and odourless.These are the major factors that are used to determine whether water is contaminated or not.