San Joaquin County operates an annual weed abatement program under Government Code §§39560–39588. Property owners receive notices in spring; unabated parcels are cleared by county contractors with costs assessed as a lien. Noxious weeds (puncture vine, yellow starthistle, johnsongrass) are separately regulated by the County Agricultural Commissioner under Food & Agricultural Code §5004.
San Joaquin County exercises its weed-abatement police power under California Government Code §§39560–39588 and Health & Safety Code §14875. Each spring the County Code Enforcement Division surveys parcels — particularly vacant lots and parcels adjacent to developed areas — and mails abatement notices giving owners 30–60 days to clear dead grass, dry weeds, and combustible rank growth. Parcels that are not abated by the deadline are cleared by county-contracted crews; the cost (plus a 25% administrative charge) is assessed against the property and becomes a lien if unpaid at the next tax bill. The County Agricultural Commissioner separately enforces the California noxious weed program under Food & Agricultural Code §5004 — properties found harboring A-rated or B-rated noxious weeds (e.g., puncture vine/Tribulus terrestris, yellow starthistle, red sesbania along the Delta) can be ordered to treat, and the Ag Commissioner may enter and abate. Fire hazard parcels in the eastern foothills have earlier deadlines tied to CAL FIRE defensible space inspections.
Notice to abate issued annually. If unabated: county contractor clears at $300–$3,000+ depending on parcel size, plus 25% admin fee. Unpaid charges become a special assessment lien per Gov Code §39574. Noxious weed non-compliance: Ag Commissioner civil penalties up to $1,000 per parcel.
San Joaquin County, CA
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See how San Joaquin County's weed ordinances rules stack up against other locations.
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