Notification is hereby given that the Environmental Protection Agency (EPA) has finalized a list of additional areas subject to the mitigation plan requirements found in the 2016 Exceptional Events Rule. This list is included within this document and is available on the Agency's website and in the electronic docket for this action. The EPA is separately notifying states with areas newly subject to these requirements. These notification letters are also available on the Agency's website and in the electronic docket for this action.