A water line break allowed more than 9.2 million gallons of treated and untreated wastewater to flow from Tijuana into the U.S. this week. The transboundary flows were reported Monday night due to a break in the main water line from the La Presa-Aguaje la Tuna urban aqueduct at about 11 p.m. CILA said the break produced flows that ended at the Tijuana River channel, causing a berm at a CILA pump station to collapse and allow wastewater into the U.S. The flow in the Tijuana River exceeded the pump station’s capacity