Walnut Creek Trash & Recycling: Illegal Dumping Rules (2026)

California Penal Code §374.3 prohibits unauthorized dumping of waste on public or private property, with escalating penalties based on quantity and recurrence. First offense: up to $1,000 fine; second: $3,000; third: $6,000. Dumping over 1 cubic yard of commercial quantity qualifies as a misdemeanor with possible jail time up to six months. Walnut Creek Municipal Code §5-8.310 mirrors state law and adds civil abatement authority — the city may assess cleanup costs as a lien against the property where dumping occurred or against the responsible party. Common dumping locations include creek corridors, open space trailheads, and commercial dumpster enclosures. The city operates a reward program offering up to $1,000 for information leading to conviction. Security cameras and license plate captures from dumpster enclosures are routinely reviewed. Abandoned mattresses, appliances, and construction debris on public rights-of-way are typically photographed and investigated before removal at taxpayer expense. Tenants who leave large items at the curb without scheduling bulky pickup may be cited for illegal dumping. Hazardous material dumping triggers additional charges under Health & Safety Code §25189.5 with felony potential.