CCCSD is one of the largest sewage plants to use ultraviolet disinfection. Its facilities include a cogeneration system, two multiple hearth furnaces for dried sludge incineration, and a recycled water plant. See also Contra Costa County Employees' Retirement Association County Retirement Plan (member) References External links Official Central Contra Costa Sanitary District website Sewage treatment plants in California Buildings and structures in Contra Costa County, California Sanitary District San Francisco Bay watershed Walnut Creek, California Martinez, California 1946 establishments in California