Wastewater Services

CVSan provides high-performance, low-cost wastewater services for residents and businesses within the unincorporated community of Castro Valley. Wastewater is used water. It includes substances such as human waste, food scraps, oils, soaps, and chemicals. In homes, this includes water from sinks, showers, bathtubs, toilets, washing machines, and dishwashers. Businesses and industries also contribute their share of used water that must be treated.

The wastewater program aims to collect and convey all wastewater produced within CVSan's boundaries to the Castro Valley/ Oro Loma Wastewater Treatment Plant in San Lorenzo. This is accomplished through establishing specifications for the construction of sewer lines, conducting inspections for compliance with those specifications, continuously performing preventive maintenance tasks on the system, repairing and replacing defective elements of the system, and managing flow rates to stay within the capacity of the collection and treatment systems.