; and (B) in the case of a freshwater hypoxia or harmful algal bloom event, the Administrator of the Environmental Protection Agency. (2) Event of national significance The term event of national significance means a hypoxia or harmful algal bloom event that has had or will likely have a significant environmental, economic, or public health impact on an affected State. (3) Hypoxia or harmful algal bloom event The term hypoxia or harmful algal bloom event means the occurrence of hypoxia or a harmful algal bloom as a result of a natural, anthropogenic, or undetermined cause. 7. Authorization of appropriations Section 609(a) ( 33 U.S.C. 4009(a) ) is amended by inserting , and $22,000,000 for each of fiscal years 2019 through 2023 before the period at the end.