Why must the IEPA regional office be notified upon issuing a boil order?

The requirement to notify the Illinois Environmental Protection Agency (IEPA) regional office upon issuing a boil order is primarily established as a state regulation. This regulation helps ensure that the appropriate authorities are informed of potential public health risks associated with drinking water quality. By notifying the IEPA, water suppliers comply with state laws designed to protect public health and safety, ensuring that the issue is documented and addressed appropriately. This process allows the state to monitor water quality issues statewide and provide guidance or support if necessary, thereby facilitating a coordinated response to protect the community's health.

While other choices touch on important concepts like communication and funding, they do not directly address the statutory obligation that exists to inform the IEPA.