The Safe Drinking Water Act (SDWA) is a U.S. law that ensures the quality of drinking water for the public. Enacted in 1974, it gives the Environmental Protection Agency (EPA) the authority to set standards for drinking water quality and oversee states, localities, and water suppliers. This law helps protect water sources from contamination, ensuring that the water we drink is safe and healthy. Under the SDWA, the EPA establishes regulations for various contaminants, including bacteria, chemicals, and heavy metals. Water suppliers must regularly test their water and report the results to consumers. This way, people can trust that their drinking water meets safety standards and is free from harmful substances.