American Rivers names Tijuana River one of America's most endangered rivers due to pollution risks.

The Tijuana River has been named one of America's "most endangered" rivers in a report released by American Rivers, a nonprofit focused on river protection. The 120-mile-long intermittent river in San Diego County is heavily polluted from raw sewage and chemical contaminants from the city of Tijuana. According to the report, the river is ranked No. 9 due to ongoing health and safety risks posed by pollution.