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- Illegal Dumping
Illegal dumping is a violation of the Diamond Bar Municipal Code, and can carry fines up to $1,000 and 180 days in jail. Call the Diamond Bar-Walnut Sheriff’s Station at (909) 595-2264 if you observe someone illegally dumping. To request cleanup of an illegal dumping site within city limits, call the City’s Public Works Department at (909) 839-7060 or use the City's online reporting form.
Residents are entitled to up to four free curbside pickups annually. Pick-ups must be scheduled in advance by contacting your waste hauler - Waste Management at (909) 599-1274, or Valley Vista at (800) 442-6454.