What does the term "primacy" refer to in the context of drinking water regulations?

The term "primacy" in the context of drinking water regulations refers to the delegation of responsibility for regulatory compliance to states. This means that the federal government, specifically agencies like the Environmental Protection Agency (EPA), grants states the authority to implement and enforce drinking water regulations within their own jurisdictions. By doing so, states are responsible for ensuring that local water systems comply with federal standards, which enables them to tailor their regulatory approaches to better fit local conditions and needs.

This system promotes local governance and accountability, allowing states to manage their own drinking water programs effectively while still aligned with federal regulations. States that demonstrate they have the capability to enforce these regulations can gain "primacy," which empowers them to oversee water quality and protect public health in their areas.