Operational since 1949, the Sonoma County Water Agency offers sanitation and flood protection services. It supplies drinking water to the cities of Cotati, Rohnert Park, Santa Rosa and Sonoma in California. The agency provides wastewater treatment services. The Sonoma County Water Agency operates an environmental resources section that conducts impact assessments and biological and cultural resource surveys. The agency also manages a water conservation department. It administers the Qualified Water Efficient Landscaper Program for landscape professionals. The Sonoma County Water Agency additionally operates a human resources department. It develops and implements several water conservation programs and rebates. The agency serves residential clients, businesses and agricultural communities. It is a part of the county government of Sonoma in California.