; but (B) estimated that there would still be on average 90 days of transboundary flows each year; (25) the Federal Water Pollution Control Act ( 33 U.S.C. 1251 et seq.) has established a stormwater permit program under the National Pollutant Discharge Elimination System, under which municipalities have the responsibility to manage and treat stormwater; (26) because of the international border and different treatment systems and standards, discharges in Mexico to the Tijuana River are not treated to the same standards as the standards to which discharges would be treated in the United States; (27) the International Boundary and Water Commission negotiated Minute 320 to find solutions for water quality, trash, and sediment in the Tijuana River; (28) the United States has— (A) invested at least $250,000,000 for secondary wastewater treatment in the Tijuana River Valley by the International Boundary and Water Commission; and (B) paid $18,000,000 to operate and maintain the plant in fiscal year 2018; (29) the United States has also helped fund water and wastewater infrastructure along the border through the Border Water Infrastructure Program and the North American Development Bank; (30) however, as the Government Accountability Office found in the report described in paragraph (8), the long-standing environmental and health problems associated with transboundary stormwater flows continue, while the International Boundary and Water Commission has not taken actions to resolve existing problems by proposing and analyzing alternatives, analyzing costs, identifying solutions, or establishing time frames; and (31) significant additional investment from Federal, State, local, and Mexican resources is needed to improve the water quality of the Tijuana River watershed. (b) Purposes The purposes of this title are— (1) to establish a program to plan and implement water quality restoration and protection activities