Q. 53.9( 7 Votes )
Name two factors
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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