Groundwater can be contaminated by bacteria and other pathogens that seep from septic tanks, broken sewer lines, and barnyard wastes. In many instances, however, this is not a serious health problem even in the presence of a large population. Why?

Question

Quizplus · Accepted Answer

The soil has the ability to filter out pathogens, especially if the groundwater is not heavily contaminated. Pathogens that seep into the soil often get trapped or broken down, reducing the potential risk to human health. Additionally, depending on the depth of the groundwater, sunlight may not play a significant role in killing off the pathogens. Warning systems and contagiousness of the diseases are not factors in the ability of soil to filter out pathogens.

Groundwater Can Be Contaminated by Bacteria and Other Pathogens That