Agricultural Commissioner's Office


Agricultural Commissioner Sealer of Weights and Measures

Greg Clark 1

New Property Access Requirements 

10/18/17 Ag Fire Access Update


All information provided below is subject to change  with high frequency and may not be the most up to date information. We are doing our very best to provide updated information in as timely a manner as possible. To verify any information, please contact our office directly at (707) 253-4357 or email us at

As of Wednesday 10/18/2017 at 10:00am our office is issuing permits for ag-business related access to the following areas:



Dry Creek Road from Orchard Avenue to Trinity Road

Redwood Road from the junction with Mt. Veeder Road. No access to Mt. Veeder Road is available at this time.



Wild Horse Valley Road from Green Valley Road. Green Valley Road is open to residents as of 5:00pm Tuesday October 17, 2017.

Atlas Peak Road from Westgate Drive will have unrestricted ag-business permitted access during the hours of 7:00pm to 5:00am starting tonight Wednesday October 18, 2017. During this time, all ag-business related activities will be allowed with a permit from our office.

Soda Canyon Road from Silverado Trail will have unrestricted ag-business permitted access during the hours of 7:00pm to 5:00am starting tonight Wednesday October 18, 2017. During this time, all ag-business related activities will be allowed with a permit from our office.



Petrified Forest Road from Saint Helena Hwy 128 to the Napa/Sonoma County Line

Hwy 128 from Bennett Lane to the Napa/Sonoma County Line



Between the hours of 5:00am and 7:00pm crews are going to be working on large infrastructure projects to restore these regions’ access as soon as possible. Due to the nature of this work, heavy restrictions are being placed on ag-business related access.

Our office is allowed to issue a limited number of ag-business related permits for the next four days: Thursday October 19, Friday October 20, Saturday October 21 and Sunday October 22, 2017.

Please consider performing any access during the less restricted periods of 7:00pm and 5:00am listed above. We encourage you to take advantage of this opportunity freeing the restricted day access appointments for critical work only. We have more entities than appointments so please be considerate of your neighbors should you be able to complete your tasks during night access.


Restrictions for “daytime” permits to Soda Canyon and Atlas Peak include:

  • We have space for five entities per region each day listed above (October 19-October22).
  • Each entity is allowed one passenger vehicle. No large vehicles or equipment will be allowed up or down these regions during restricted access.
  • Each vehicle is limited to two persons only.
  • Permitted entities will be escorted up between 10:00am and 11:00am and escorted back down between 4:00pm and 5:00pm. You will be able to leave the hill during the 10:00am to 11:00am hour should you be able to complete your tasks during that very short time period. Otherwise all personnel are to stay on their site until escorted back down during the 4:00pm and 5:00pm access window.
  • All persons are required to stay on site and not allowed back out on the roads unescorted. No movement along the roads during restricted time periods will be allowed unescorted.
  • We are taking requests for these restricted access appointments. No appointment can be guaranteed as such a limited number are available.    

Safety is the number one priority while these special access permits are being used. Please remember to take all necessary precautions to provide safe work environments for employees. All permitted areas are under ongoing repair work by numerous entities – please be aware of the safety concerns of these crews and yield to any authority in the region.


Please contact our office (707) 253-4357 or  to obtain a permit or if you have any questions or concerns. Thank you for your patience and understanding as we are processing a large number of requests at this time. 

To reiterate, this process is solely designed to aid businesses in gaining access to properties for legitimate business purposes. 



Be advised that according to CalFire officials, grapes that have been contacted by flame retardant are not safe for humans and should not be harvested.

Thank you for your cooperation.




Agricultural Commissioner / Sealer of Weights and Measures 

The Napa County Agricultural Commissioner and staff are responsible for the implementation of federal, State and local regulatory programs within Napa County. These programs are designed to protect people and the environment and to promote agriculture within the county. Napa County currently has a reputation as a premier wine-producing region, but, as history has shown, also has the climate and soils capable of producing many types of exceptional agricultural products.



Food Quality and Marketing

Direct Marketing, Farmers' Markets, Organic Registration, Standardization

Pesticide Safety Program

CalAgPermits, Continuing Education Resources, Pesticide Container Recycling, Pesticide Use Enforcement   

Pests and Diseases

European Grapevine Moth, Vine Mealybug, Glassy-winged Sharpshooter, Light Brown Apple Moth, Brown Marmarated Stink Bug

Bring in an insect for identification (learn more)

Weights and Measures

Device Registration Ordinance, Quality Control of Packaged Goods, Weighing and Measuring Devices

Wildlife Services

Introduction to the Program, Tips to Prevent Wild Animal Encounters


Other Department Information


Buy Plants Locally!

Buy plants in Napa County where they are inspected for Glassy-winged sharpshooter egg masses. Your help has kept this important vector of Pierce’s disease out of the County for over 15 years. The health of the Napa County vineyards and economy depends on this effort!

Don't Bug Out PSA
Buy Local Plants PSA


European Grapevine Moth Eradicated from California!

The European Grapevine Moth has been eradicated from California and the quarantine restrictions have been lifted!

CDFA News Release
EGVM Information

VMB Seminar 2017

2017 Vine Mealybug Seminar

In February 2017, the Ag Commissioner's Office and the Napa County Pest and Disease Control District sponsored a free informational Vine Mealybug Seminar for local grapegrowers. PDFs of the PowerPoint presentations are now available!

Ag Commissioner's Office 2016 Update
Ag Commissioner's Office 2016 Update in Spanish
VMB Challenges- Grower Perspective
VMB Challenges- Grower Perspective in Spanish
VMB Biological Control and Mating Disruption
VMB Biological Control and Mating Disruption in Spanish
VMB Chemical Control Options
VMB Chemical Control Options in Spanish