In March of 2018, the California cities of Imperial Beach, Chula Vista and the Port of San Diego sued the U.S. arm of the International Boundary and Water Commission over its failure to mitigate the flow of sewage-tainted water from the Tijuana River in Mexico. The lawsuit was in response to a February 2017 crisis, when more than 200 million gallons of sewage contaminated the California coast after a winter storm damaged sewer infrastructure in Mexico (“Two countries, one border and their shared pollution,” 12/06/18).