In 2008, Delta Diablo (District) implemented a Sewer System Management Plan (SSMP) pursuant to State Water Resources Control Board Order 2006-0003, Statewide General Discharge Requirements of Sanitary Sewer Systems. The goal of the SSMP is to minimize the frequency and severity of sanitary sewer overflows (SSOs). The SSMP covers the management, planning, design, operation, and maintenance of the District’s sanitary sewer system. The District’s Board adopted the SSMP Development Plan and Schedule at its meeting on July 11, 2007, approved the final SSMP on April 8, 2009, and approved the Updated SSMP as revised by Order No. 2013-0058-EXEC on October 10, 2018. 
The SSMP is available for review at the District Offices, 2500 Pittsburg-Antioch Highway in Antioch during normal business hours or can be viewed here Sanitary Sewer Management Plan (pdf).  Interested parties can contact our Maintenance Manager, Dustin Bloomfield, at 925.756.1918 or dustinb@deltadiablo.org for additional information. The District reports SSOs electronically to the California Integrated Water Quality System (CIWQS). The electronic SSO data are available by agency or region at: http://www.waterboards.ca.gov/water_issues/programs/ciwqs/publicreports.shtml