What percentage of public and private water supplies is provided by groundwater?

The correct answer indicates that approximately 70% of both public and private water supplies in the United States come from groundwater sources. Groundwater is a vital resource and accounts for a significant portion of the overall water supply because it is often more accessible and can be tapped directly from aquifers, making it a reliable source for drinking water, irrigation, and other uses.

This percentage reflects the extensive use of groundwater for various applications, including agricultural irrigation, which constitutes a large demand for water sources. Groundwater also offers a natural filtration process as it moves through soil and rock layers, often resulting in cleaner water compared to surface water bodies that may be more susceptible to pollution and seasonal variations.

Understanding the reliance on groundwater is important for managing water resources effectively, particularly in the context of sustainability and environmental conservation. Monitoring and protecting groundwater sources are essential for ensuring long-term availability of this crucial resource.