Question

List the two ways which can be used to check the contamination of river water

Answer 1

growth of BGA blue green algae
or by checking of the ppm of water

Answer 2

The two ways to check the contamination of river water are as follows:

Explanation:

• A water body may get contaminated due to the discharge of sewage, industrial and household waste in water. This is likely to affect the quality of water and make it unfit for human consumption.
• The physical and chemical tests can be used to detect the minerals and organic substances present in water responsible for polluting water.        
• The biological tests are used to detect the presence of bacteria because of fecal matter discharge in water.    

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