The treated wastewater from our two treatment plants is released over four miles out into the ocean at a depth of two hundred feet below the surface of the water. To ensure that the marine environment and public health are protected, the Orange County Sanitation District has maintained an extensive ocean monitoring program for over 25 years. The results of this testing is gathered together each year in an annual report. The report is provided to regulators, the scientific community and the public through a published report, on the district website and through a series of public workshops. The ocean monitoring program is overseen by the United States Environmental Protection Agency, Region IX and the Regional Water Quality Control Board, Santa Ana Region.