Assertion (A): Runoff from only paved surfaces is used for storing rainwater. Reason (R): It is relatively free of bacteriological contamination.

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KollegeApply · Accepted Answer

Both A and R are true and R is the correct explanation of A. Explanation: Runoff from only paved surfaces is used for storing rainwater because it is relatively free of bacteriological contamination. Paved surfaces like rooftops do not have soil or organic matter that could harbor bacteria, making the collected runoff safer for storage and use. This is why paved surface runoff is preferred for rainwater harvesting and storage systems.

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