West Contra Costa County residents can properly dispose of household hazardous waste at the drive-through drop-off center – for no charge. Medical waste disposal is offered for most medications and sharps (no controlled substances). Call or visit website for acceptable materials, packaging guidelines, and directions. This facility is available to residents of El Cerrito, Hercules, Pinole, Richmond, San Pablo, El Sobrante, North Richmond, Kensington, Crockett, Port Costa and Tormey. Free Household Hazardous Waste Mobile Collection pickup service available to residents who are age 60 or older or are a disabled person residing in the cities of El Cerrito, Richmond, San Pablo, Hercules, Pinole or El Sobrante. Call for an appointment.