The City of Lodi service area is approximately 12 square miles, has approximately 25,000 residential, 1,300 commercial and 55 industrial sewer connections and one Wastewater Treatment Plant. The City provides service to a population of approximately 68,000 people. The wastewater collection and conveyance system consists of 197 miles residential and 6 miles of industrial sewer pipe ranging in size of 4” to 36” in diameter, about 3,700 manholes, and 13 neighborhood pumping or lift stations that convey an average dry weather flow of approximately 8.5 MGD. Sanitary sewage is conveyed from the City’s service area to White Slough Water Pollution Control Facility.
The California State Water Resources Control Board (SWRCB) adopted a Statewide General Waste Discharge Requirement (WDR) order No. 2006-0003 May 2, 2006. The WDR was amended by order No. 2013-0058-EXEC effective September 9, 2013. This WDR dictates each publicly owned sanitary sewer system, develop, document, and implement a Sewer System Management Plan (SSMP) and make it available to the public and State and Regional Water Quality Control Boards (RWQCB) upon request. SSMPs are state-mandated requirements for California public collection system agencies that own or operate sanitary sewer systems greater than one (1) mile in length. The goal for this plan is to reduce sanitary sewer overflows, protect public health and environment and improve the overall maintenance and management of the sewer system.