Do California Agricultural Vehicles Need Clean Truck Check Testing? Yes—Here’s What You Need to Know

If you operate agricultural trucks in California, it’s not just smart to stay compliant with emissions testing—it’s the law. Under California’s Clean Truck Check (Heavy-Duty Inspection and Maintenance Program), most agricultural vehicles are required to undergo annual emissions testing, even if they only run seasonally or locally.

At NorCal CARB Mobile, we make it easy by bringing certified Clean Truck Check testing right to your ranch, farm, or facility. No hauling. No downtime. Just fast, compliant testing—on your schedule.

🌾 What Is the Clean Truck Check Program?

California’s Clean Truck Check is a statewide regulation requiring emissions testing for most diesel and alternative-fuel heavy-duty vehicles with a GVWR over 14,000 lbs. That includes many agricultural trucks, especially:

• Grain haulers

• Livestock carriers

• Flatbeds and stake trucks used for crop transport

• Truck-tractor and trailer combinations hauling to the first point of processing

Even if your vehicle is only used seasonally or stays on rural roads, you still may be required to test annually.

🧑‍🌾 What Is an Agricultural Vehicle—And Does It Need Testing?

An agricultural vehicle is defined by the California Air Resources Board (CARB) as any vehicle:

• Owned or operated by a farming business, and

• Used exclusively for agricultural operations, such as transporting farm products to the first point of processing

🛑 Personal-use vehicles, general transport vehicles, and those not directly supporting farming do not qualify for agricultural exemption status and still need testing if they meet Clean Truck Check criteria.

✔️ If your ag vehicle operates in California and weighs over 14,000 lbs, chances are it needs to be tested annually.

🧪 How Often Do Agricultural Vehicles Need Testing?

Only once per year—and NorCal CARB Mobile makes it simple:

• Testing can be done up to 90 days before your deadline

• We test on-site at your farm or facility

• We issue test results, documentation, and submit to CARB directly

📆 Book early to ensure compliance before peak season.

🛻 Why Choose NorCal CARB Mobile?

We’re a CARB-credentialed Clean Truck Check testing provider based in Northern California and focused on serving:

• Farmers

• Ranchers

• Ag transport companies

• Packing houses and processors

With mobile service, we come to you—whether you’re in Yuba City, Modesto, Fresno, the Central Valley, or anywhere in between.

✅ No trips to a test station
✅ No waiting in line
✅ No down days during harvest

📞 How to Schedule Your Agricultural Vehicle Emissions Test

Getting started is easy. You can:

• Visit NorCalCARBMobile.com to request a test

💡 Need Help Determining If You’re Covered?

If you're unsure whether your ag vehicle qualifies or needs to be tested, we’re here to help. Our team is trained to interpret CARB regulations and ensure you’re in full compliance.

📧 Email us at office@norcalcarbmobile.com or call 916.890.4427 for a quick assessment.

🌱 Stay Compliant, Stay Productive.

The Clean Truck Check isn’t going away—but non-compliance penalties can be avoided. Let NorCal CARB Mobile handle your emissions testing while you focus on growing California’s future.