Rep. Darrell Issa, R-Calif., told Newsmax on Wednesday that President Donald Trump must demand that Mexico do more to stop the flow of wastewater from the Tijuana River Valley, which is having a devastating impact on Southern California.

The Tijuana River flows along the southern U.S. border through Mexico for most of its course before crossing into Southern California and emptying into the Pacific Ocean. It has been rife with untreated sewage and industrial waste from Tijuana for decades, the Los Angeles Times reported.

The city’s growth has far outpaced the capacity of the sewage treatment plants that serve it, and inadequate and broken plants spew waste into the river, polluting the water and air at Imperial Beach and other California communities near the border.

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