EPA Region 9 (Pacific Southwest)

EPA and Secretariat of Environment and Natural Resources (SEMARNAT) are committed to fully and faithfully implementing the July 2025 MOU and achieving a permanent solution to the Tijuana River sewage crisis that’s afflicting communities on both sides of the U.S.-Mexico border. EPA and SEMARNAT also agree that, in accordance with the MOU, transparency and public participation are key to successfully achieving a durable solution to this crisis. See EPA's Public Updates on Progress at the Tijuana River Watershed.