Central Contra Costa Sanitary District - Wikipedia
https://en.wikipedia.org/wiki/Central_Contra_Costa_Sanitary_District
In the 1940s, central Contra Costa County was a rural area of farms, orchards and a few small towns. With the end of World War II, a building boom began. As the nearby cities of San Francisco, Oakland and Berkeley grew, so did the population of Contra Costa County. 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. At the time, State health authorities con…
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