Which federal agency regulates drinking water quality in the United States?

The Environmental Protection Agency (EPA) is the federal agency responsible for regulating drinking water quality in the United States. The EPA implements the Safe Drinking Water Act, which establishes standards and regulations to protect public health by ensuring safe drinking water. This includes overseeing water treatment processes, setting limits on contaminants, and requiring public water systems to monitor for substances that could pose health risks.

The agency's role involves evaluating and enforcing water quality standards, conducting research, and providing guidance and technical assistance to state and local governments responsible for managing public water systems. Through these efforts, the EPA plays a critical role in safeguarding the nation’s drinking water supply against pollution and contamination, ultimately protecting consumers' health.

In contrast, while the other agencies listed have important public health and safety roles, they do not focus specifically on drinking water quality regulation. The Centers for Disease Control and Prevention (CDC) primarily deals with disease control and prevention but collaborates with the EPA on water-related health issues. The Food and Drug Administration (FDA) regulates food and beverages, which may include bottled water, but not public drinking water supplies. Occupational Safety and Health Administration (OSHA) oversees workplace safety and health regulations, excluding water quality standards for drinking water.