The Castro Valley Sanitary District (CVSan) is a small public agency organized under the Health and Safety Code of the State of California. As a California Special District, CVSan has responsibility for the operation and maintenance of the sanitary sewer collection system within the unincorporated community of Castro Valley. CVSan also is in charge of the administration of a refuse collection franchise, a 25% interest in a wastewater treatment facility, implementation and administration of State and local mandated recycling programs, as well as participation in sub-regional wastewater discharge and solid/hazardous waste management agencies.