Sanitary sewer overflows are a serious problem in sewer systems throughout Orange County and, in coastal cities, have resulted in many beach closures. The Grand Jury recently issued a report noting grease as one of the most prevalent causes of sewer overflows. An analysis of overflows in the City of Laguna Beach sewer system, between 1997 and 2000, revealed that roots and grease are the two primary causes of spills.
Grease in the sewer system is generated in large quantities by food preparation facilities, such as restaurants and grocery store delis that sell food for immediate consumption. Grease from food preparation and cooking coagulates in the sewer pipes when it cools down and can restrict the flow of wastewater. Restricted flow causes solid material in the pipe to accumulate, resulting in blockages and wastewater spills.
Given the magnitude of these problems, and the fact that the City was fined by the San Diego Regional Water Quality Control Board, serious action is necessary to reduce sanitary sewer overflows. In May 2001, the City Council reviewed the grease problem in the City and directed staff to obtain a proposal to enforce Title 17 of the Municipal Code regarding sewer maintenance, use and design. A primary concern at the time was to reduce the impact of grease on the sewer system.