This ultimately resulted in a sanitation crisis with most of the county depending on septic systems, often inefficient due to the area's heavy adobe clay soil.
With septic tanks overflowing and waterborne diseases such as typhoid becoming a potential threat, civic leaders rallied public support for a solution.
On July 15, 1946, the County Board of Supervisors passed a resolution officially creating the Central Contra Costa Sanitary District (CCCSD).
Board Members attended a groundbreaking ceremony on November 10, 1947, to mark Central San's first construction—the main trunk sewer at the east end of Moraga Boulevard.
Work began immediately and within 26 months, CCCSD's newly constructed main sewer trunk line and treatment plant were operational.