The head of the Environmental Protection Agency says his agency will be providing Mexico a list to complete to stop the flow of sewage from Tijuana.

EPA Administrator Lee Zeldin visited the polluted Tijuana River on the U.S.-Mexico border, calling for a '100% solution' to clean up raw sewage that has fouled the waterway for years.

The Trump administration's EPA chief got a firsthand look at the Tijuana River sewage crisis on Earth Day and expressed optimism about working with Mexico to solve the public health crisis. Why it matters: Millions of gallons of untreated sewage from the border flows into the Pacific Ocean daily,