San Diego officials are continuing to pressure the federal government to fix the border region’s sewage issues.

Last week, the cities of Imperial Beach, Chula Vista, Coronado and San Diego, as well as San Diego County, Port of San Diego, San Diego Regional Water Quality Control Board and the California State Lands Commission, passed resolutions to recommend federal action on cross-border pollution in the Tijuana River Valley.

Tijuana is built into hillsides, where rainwater — or sewage when the wastewater system fails — naturally drains toward the U.S.-Mexico border and into the Pacific Ocean.