The District has prepared a Sewer System Management Plan (SSMP) following the requirements of the State Water Resources Control Board (SWRCB) Order No. 2006-0003-DWQ, Statewide General Waste Discharge Requirements for Sanitary Sewer Systems.  The SSMP is a comprehensive document describing operations and management practices designed to minimize the frequency and impacts of SSOs and ensure long-term effectiveness of the collection and conveyance system infrastructure.  The SSMP will be updated regularly, with the last update being approved by the District’s Board of Directors on May 14, 2025. The SSMP is available for review at the District Office, 2500 Pittsburg-Antioch Highway in Antioch, during normal business hours. Interested parties can contact Dustin Bloomfield, Maintenance Manager,  at 925.756.1918 or dustinb@deltadiablo.org for additional information.