Because it is filtered through earth material, groundwater is usually free of what?

Groundwater typically possesses lower turbidity levels due to its passage through soil and other earth materials, which act as natural filters. This filtration process removes many suspended particles and impurities that contribute to turbidity in surface water sources. As water seeps through the soil, larger particles such as silt and clay are trapped, allowing cleaner water to accumulate in aquifers.

The effectiveness of this natural filtration can vary based on the geological composition of the soil and the depth of the groundwater. While groundwater may still contain some minerals and substances that could affect water quality, the process of filtration significantly reduces its turbidity, making it generally clearer than untreated surface water. This characteristic is vital for drinking water supplies, as lower turbidity can indicate a reduced presence of harmful microorganisms and other pollutants.