Imperial Beach, just north of the U.S./Mexico border is one of the most polluted beaches in America thanks to the outflow of the Tijuana River. It's been a problem that has persisted for decades.

“Mexico has a strong claim that it needs to be consulted on anything that would affect the movement of water,” said Stephen Mumme, a political science professor at Colorado State University and an ...

7 weeks later, Tijuana River Valley basin remains carpeted with trash and debris from Mexico It resulted in a thick layer of trash, several feet deep, in an area of the Tijuana River Valley Basin ...