A new agreement between the United States and Mexico will stop the flow of sewage from Tijuana into Southern California through the Tijuana River. For years, sewage crossing the border has resulted in beach closures and caused people to get sick.

The governments of Mexico and the United States signed a memorandum of understanding on Thursday to fund and expedite several wastewater treatment projects in the Tijuana River basin. Untreated wastewater continually affects residents living along the river,