The CDC and the EPA test water regularly to ensure it is free from pathogenic agents and is of acceptable quality.

The CDC (Centers for Disease Control and Prevention) and the EPA (Environmental Protection Agency) both play important roles in monitoring the quality of water in the United States. The CDC primarily focuses on ensuring that water is free from harmful pathogens and other infectious agents that could pose a risk to public health.

The EPA, on the other hand, sets and enforces standards for water quality, including limits on pollutants and contaminants that may be present in drinking water sources. The EPA also conducts regular monitoring of water supplies to ensure that these standards are being met.

By working together, the CDC and EPA help to ensure that the water we use for drinking, cooking, and bathing is safe and of acceptable quality. Their efforts help to protect public health and prevent waterborne diseases and other health risks associated with contaminated water sources.