The escalating pollution from the Tijuana River into the United States is severely impacting coastal communities in Southern California, leading to calls for more forceful measures against Mexico. Beaches in Imperial Beach, once renowned for fishing and surfing, are now among the most contaminated in the country, while the popular shores of Coronado are frequently subjected to advisories due to sewage contamination.
The Tijuana River flows along the U.S.-Mexico border before draining into the Pacific Ocean, with approximately three-quarters of its watershed located in Mexico. This region faces significant challenges with sewage management and overall pollution.
Past administrations have attempted to address the issue. During his first term, former President Donald Trump supported the funding of a water treatment plant on the U.S. side as part of the U.S.-Mexico-Canada Agreement (USMCA). The Trump administration later secured an agreement with Mexico for the construction of new sewage treatment facilities on the Mexican side, intended to be funded by Mexico.
However, the situation has grown more critical recently. Toxic gases emanating from the sewage in the Tijuana River have exceeded safety standards approximately 10% of the time, a significant increase from about 2% in early 2024, according to The California Post. This ongoing contamination poses a threat not only to local residents and tourists but also to national security interests, including U.S. Navy SEALs and other specialized military units who train in the affected waters.
Given the worsening conditions and the urgency of the problem, there is a growing sentiment that the U.S. should apply greater pressure on Mexico to expedite the upgrades to its sewage treatment infrastructure. The current approach of waiting for Mexico to implement upgrades is viewed as insufficient given the persistent and worsening environmental and health risks along the U.S. coastline.