4/4/2017 New York Times
SAN DIEGO — A binational commission said Monday that it couldn’t determine how much sewage spilled into the southwestern corner of the United States from Mexico from aging infrastructure in the border city of Tijuana.
The International Boundary and Water Commission said Mexican authorities reported 28 million gallons (106 million liters) spilled from Feb. 1-4 during a repair to Tijuana’s sewage system, far less than 143 million gallons (541 million liters) initially reported. But the report found that an unknown additional amount of sewage spilled from other sources such as blocked or collapsed pipes in Tijuana and sewage overflow during heavy rains.
“It is difficult to determine the exact flow since it was not directly measured,” according to the commission, which addresses border disputes over water and other issues.