When comparing surface water and groundwater, which statement is true?

Surface water is indeed more likely to be polluted compared to groundwater due to its exposure to various environmental factors. This includes runoff from agricultural land, industrial discharges, urban waste, and natural contaminants. Surface water bodies, such as rivers and lakes, are easily accessible to pollutants carried by precipitation or direct discharge, making them susceptible to contamination.

In contrast, groundwater acts as a natural filter as it moves through soil and rock layers, which can help remove some contaminants. However, it is still important to monitor groundwater quality, as it can become polluted from sources such as leaking underground storage tanks or septic systems.

The other statements do not accurately reflect the nature of surface and groundwater. Groundwater does not consistently have higher pH levels than surface water, and treatment is usually necessary for both sources to ensure safety for consumption. Additionally, surface water is not always safe for drinking without proper treatment or filtration.