Under the agreement, the countries are committed to updating outdated wastewater infrastructure to handle higher flows.By Kiley PriceEvery day, the Tijuana River spews millions of gallons of untreated sewage from Mexico into California, much of which ends up in the ocean. For decades, this steady churn of wastewater has overloaded aging infrastructure on both sides of the border, posing a major ecological and public health issue for communities in Tijuana and San Diego. 

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