Q. 53.9( 7 Votes )
Name two factors which can be used to find whether river water has been contaminated.
The two factors which can be used to find whether the river water has been contaminated are:
i) The presence of coliform bacteria in rainwater.- Coliform is a harmless bacteria found in human intestine. However, if coliform is present in water it is a sign that the water may contain other harmful bacteria.
(ii) Measurement of pH of rainwater.- pH level below 7 indicates high levels of acid and hence confirms the contamination of water.
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