Starting in the 1930s as a garbage company in Concord, California, Mt. Diablo Resource Recovery has evolved into a trusted, proven, and essential service provider to more than 250,000 residents and thousands of businesses throughout Contra Costa, Napa, and Solano Counties. We are a leader in the environmental services industry because we keep far more material out of landfills and redirect more discarded resources to people in need than any of our competitors. Using an approach called Community Resource Optimization, we increase the economic value of every material stream we collect and process.