Weights & Measures Division
The Weights and Measures Division ensures fairness and accuracy in the marketplace for Mendocino County consumers and businesses. We protect economic equity through the rigorous inspection, testing, and certification of commercial weighing and measuring devices, packaged commodities, and petroleum products.
Please note: The County Agriculture, Weights & Measures Department is only one of several agencies responsible for investigating consumer complaints. Please check other listings for agencies and authorities dealing with specific issues.
Commercial Device Registration
Overview
The Weights and Measures Division ensures the accuracy of all commercial weighing and measuring devices in Mendocino County. To operate legally, device owners must register their type-approved equipment with the county and pay all applicable registration fees.
Following registration, county inspectors will test and seal the device. Only type-approved and officially sealed equipment may be used for commercial transactions.
The following devices are registered and inspected annually by the Department:
- Bulk fuel delivery trucks
- Retail petroleum fuel pumps
- Liquid Propane dispenser meters
- Grocery counter and hanging scales
- Vehicle scales
- Livestock scales
- Taxi meters
- Platform scales
Contact Us
If you need to register your device, or if you suspect a commercial scale or meter is inaccurate, please contact the Department at 707-234-6830 to request an official inspection.
W&M Laws and Regulations:
Mendocino County Municipal Code § 10A.16.030 - Device Registration:
“No person shall use any commercial weighing or measuring device without first registering the device with the County Sealer. The registration shall be in addition to any other certificate, license, or permit which may be required by the County or any other public entity. (Ord. No. 4228, 9-1-2009)”
Schedule an appointment for device registration and inspection with the Department by emailing agcomm@mendocinocounty.gov or calling 707-234-6830.
Device Registration Fees(PDF, 87KB)
Purchasing or Servicing Type-Approved Commercial Devices
Buying the wrong equipment or letting an unauthorized person repair it can lead to business delays, fines, or your equipment being taken out of service.
- Commercial Device Type-Approval: Before buying any equipment, always verify that the specific model is type-approved for commercial trade in California. Many retail or online suppliers sell scales labeled "legal for trade" that lack a valid California Type Evaluation Program (CTEP) or National Type Evaluation Program (NTEP) certificate. If it doesn’t have these certifications, we cannot register or seal it for commercial use.
- Locating Suppliers & RSAs: Do not hire uncertified technicians to work on your devices. Calibration, repairs, and commercial service must be performed by a state-licensed Registered Service Agency (RSA). For help verifying a scale's type-approval or to locate a licensed RSA, please contact our office directly at 707-234-6830.
Petroleum Products
Not only do our inspectors test the accuracy of Retail Petroleum meters, but they also audit fuel stations for correct signage, pricing notifications, and fuel quality among other things. If you feel signage is inaccurate or inadequate, or if you believe you have purchased low-quality fuel, please call our office and register a complaint.
Contact Us
890 N. Bush Street
Ukiah, CA 95482
Phone: (707) 234-6830
Fax: (707) 463-0240
agcomm@mendocinocounty.gov
Hours
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Monday-Friday
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OPEN 8 am -12 pm, 1 - 5 pm
CLOSED for lunch 12 - 1 pm |
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Saturday & Sunday
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| CLOSED |
We highly encourage scheduling service appointments ahead of time for:
- Licenses, Registrations & Certifications
- Scale Inspections
- Pesticide Operator-IDs
Note: We cannot guarantee inspector availability for walk-in services.
Hours