Which federal agency is responsible for protecting the groundwater supply in the United States?

The Environmental Protection Agency (EPA) is the federal agency tasked with protecting the nation's groundwater supply. It plays a crucial role in regulating and enforcing environmental policies related to water quality and pollution control. The EPA administers various laws, including the Safe Drinking Water Act, which encompasses protections for underground sources of drinking water.

The agency conducts research, sets standards, and oversees state programs to ensure that groundwater is maintained and protected from contamination. Its efforts are vital in safeguarding this essential resource, as groundwater serves as a critical source of drinking water for millions of Americans. By imposing regulations and providing guidelines for safe water practices, the EPA aims to mitigate risks associated with pollutants that can migrate into groundwater supplies, thereby ensuring public health and environmental integrity.