Sanitary sewer service in Port Costa was for a long time provided by
Sanitation District #5 of Contra Costa County ("SD-5"), which was run by the
County Public Works Dept. The Port Costa treatment plant was built in 1984
to serve the tiny community. Following the formation of Crockett Community
Services District in 2006, a Port Costa Sanitary Commission was appointed by
the District Board to oversee transfer of the sewage facilities to a new
Port Costa Sanitary Department. That department assumed operational control
of the Port Costa wastewater treatment plant and sewer system in June 2008.
Development in Port Costa is constrained by the Carquinez Strait to the
north and the hilly topography and unstable soils of territory in the other
directions, most of which is now owned by the
Port Costa Conservation Society or the
East Bay Regional Park District and
thereby removed from consideration for development. The Port Costa Sanitary
Dept. foresees very limited infill growth and anticipates no need for
expansion of its facilities.