About the Hyperion Diversion

Hyperion Plant's Five-Mile Outfall is a pipe that runs under the ocean and through which Los Angeles' processed wastewater, called effluent, is discharged on a daily basis. It was built in 1960, and is inspected externally every year. The Five-Mile Outfall has never been inspected internally during its near 50-year existence.

For further reading, visit LA Sewers, City of Los Angeles, Department of Public Works.