Examveda

Which of the following is NOT a source of groundwater contamination?

A. Agricultural runoff

B. Septic systems

C. Urban rainfall

D. Bedrock composition

Answer: Option D

Solution (By Examveda Team)

Bedrock composition is a natural geologic feature and does not directly cause contamination.Other options can introduce chemicals or pathogens.

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Related Questions on Groundwater and Hydrogeology

What is an aquifer?

A. Rock that does not hold water

B. Layer that restricts water flow

C. Permeable rock that stores and transmits water

D. Layer that absorbs contaminants