Department of Agriculture /
Weights & Measures

The Department of Agriculture/Weights and Measures enforces the laws and regulations of the California Food and Agriculture Code, the California Business & Professions Code and the California Code of Regulations while serving at the discretion of the County Board of Supervisors and CDFA's  Secretary of Food & Agriculture. Sonoma County's Department of Agriculture/Weights & Measures employs a staff of thirty-nine people and has its main office in Santa Rosa.  To serve the public's needs, two small satellite offices with limited public hours are operated in the cities of Sonoma and Petaluma.

Agriculture/Weights & Measures Office Closure

The County of Sonoma has transitioned to a temporary and precautionary suspension of non-essential operations as an effort to protect employees and the community by limiting person-to-person contact.  While the Department of Agriculture/Weights & Measures is temporarily closed, we will continue to provide essential services in support of agriculture, the health and safety of our community, environment, and the economy through education and the enforcement of laws and regulations.  

    To access these services, please leave a voicemail message at (707) 565-2371.  You may also send an email to or leave your documents in the locked drop box outside the front door of our main office.  All voicemail, email, drop box, and U.S. Mail will be checked at least once each business day.  

    Thank you for your patience and understanding while we work together to keep our communities safe.

    This message will be updated if the situation changes. 

    Public Review Draft version of VESCO Best Management Practices for Agriculture Erosion and Sediment Control Manual

    This downloadable PDF is of the DRAFT version of the BMP manual used in the VESCO Program as a regulatory guide. The updated manual includes guidelines for Geologic reports, geotech and soils reports, drainage reports, biological reports including wetland and focused species reports, standard plan notes and glossary. This document is currently under review and has not yet been adopted by the Agricultural Commissioner.

    Best Management Practices Manual (PDF: 3.79 MB)


    A thriving agricultural industry, healthy community, environment, and economy


    To promote and protect agriculture, the health and safety of our community, environment and the economy through education and the enforcement of laws and regulations.

    We would appreciate any comments you have to help make our site easier for you to use.

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    Contact Information

    Department of Agriculture / Weights & Measures
    Business Hours
    Monday – Friday
    8:00 AM – 4:00 PM

    Closed 12:00 PM - 1:00 PM

    Main Office
    133 Aviation Boulevard
    Suite 110
    Santa Rosa, CA 95403

    Industrial Hemp Program

    The Sonoma County Industrial Hemp Program was made possible through the promulgation of the Sonoma County Industrial Hemp Ordinance, adopted by the Board of Supervisors on January 6, 2020.

    Industrial Hemp

    Sonoma County Cannabis Program

    Learn More

    Sonoma County Cannabis Program

    Permits for cultivation and distribution, taxes, policy, personal use, and more.


    Transgenic Contamination Prevention (GMO)

    Sonoma County Hills

    The purpose is to protect native plants, trees, and animals from transgenic contamination

    Quick Links

    Certified Farmers' Markets in Sonoma County

    Produce Gardener

    Locally grown, fresh fruit and vegetables benefit the consumer & the environment

    SB 272

    Senate Bill 272 requires local agencies publish a list of systems that serve as original sources of data within an agency.

    Read more