For residents who are concerned about illegal dumping in Contra Costa County, here is what you can do: The number to report illegal dumping within the county is 1-800-NO-DUMPING.
In Alameda County, you can use the report button on this page. In addition, if you witness illegal dumping, you can call 925-646-2441 with relevant information in order for it to be investigated. You can also use the Mobile Citizen app. If you are contracting someone to dispose of garbage, make sure they are disposing of it in a legal dumping area.
