The San Diego region has secured $300 million in federal funding for a new U.S. facility to capture Tijuana sewage spills before they foul South Bay shorelines, elected leaders said Friday. “This has been an issue in our region for decades, and concrete federal action to address cross-border pollution has been long overdue,” said Rep. Mike Levin, D-San Juan Capistrano, at a news conference in Chula Vista. Congressional leaders announced the funding in December, but it wasn’t clear whether that money would be doled out across the entire southwest border or dedicated specifically to address pollution in the Tijuana River Valley.