I hope they installed cameras: Illegal dumping cleanup in Oakland, California

According to the San Francisco Chronicle ("Dramatic before and after photos show Oakland street cleanup") a cleanup of a 2.5 mile stretch between Permain Street and Douglas Avenue in Oakland, California, a street that repetitively experiences illegal dumping involved 135 volunteers who removed 24 tons of refuse in a five hour effort.

It was organized by the Alameda County Illegal Dumping Pilot which is:

a six month-long endeavor to end illegal dumping regionally. Through education (teaching school children, landlords, and businesses about the dumping issue), eradication (sending out clean-up crews), and enforcement (cracking down on illegal dumpers), they hope to create a permanent shift in people's behavior.

While I think education and such is important, and it does reduce dumping by the small grouping of people who listen, as well as by making legal dumping easier, the best way to address illegal dumping is cameras, enforcement, big fines, and community service focused on making the people clean up the places they've soiled.

That's what they're doing with great effect in St. Louis ("Foc used ways to deal with illegal dumping: camera-based enforcement," 2018).