Property owners must control noxious weeds identified by the Contra Costa County Agricultural Commissioner under California Food and Agriculture Code §5004. High-priority weeds in Concord include yellow starthistle, artichoke thistle, and medusahead. Non-compliance can trigger state abatement action.
California Food and Agriculture Code §5004 authorizes county agricultural commissioners to maintain noxious weed lists and require property owners to control designated species. The Contra Costa County Department of Agriculture enforces this program in Concord and prioritizes weeds rated A (highest eradication priority) and B (control required in uninfested areas) by CDFA. Common noxious weeds in the Concord area include yellow starthistle (Centaurea solstitialis), artichoke thistle (Cynara cardunculus), medusahead (Taeniatherum caput-medusae), perennial pepperweed, and purple loosestrife. Property owners with infestations can receive notice from the Agricultural Commissioner requiring treatment by mowing, tillage, herbicide application, or manual removal. Non-compliance can result in the county performing abatement and billing the property owner. ConFire's weed abatement program addresses fire-fuel concerns (grass height) while the Ag Commissioner handles invasive plant concerns. Both can enforce concurrently. Property owners are also responsible for preventing the spread of weeds onto neighboring properties, and may face civil liability if their neglect causes infestation on adjoining land. Herbicide use must comply with California Department of Pesticide Regulation rules and label restrictions.
Contact your local code enforcement office for specific penalty information.
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Side-by-side rule comparisons with other cities in Contra Costa County.
See how other cities in Contra Costa County handle weed ordinances.
See how Concord's weed ordinances rules stack up against other locations.
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