Which one of the following aquifers would be best for purifying groundwater that is contaminated with harmful sewage bacteria?
A)Highly fractured granite
B)Coarse gravel with few small grains
C)Sand
D)Cavernous limestone

Question

Quizplus · Accepted Answer

Sand is the best choice for purifying groundwater contaminated with harmful sewage bacteria because it has a high porosity and permeability, allowing water to flow through easily while also filtering out bacteria and other contaminants. Additionally, the small spaces between sand grains allow for the growth of beneficial bacteria that can further break down any remaining contaminants. Highly fractured granite, coarse gravel with few small grains, and cavernous limestone are less effective at filtering out bacteria and may not allow for sufficient water flow.

Which One of the Following Aquifers Would Be Best for Purifying