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About Us

Ensuring CARB Compliance for a Cleaner Future

California’s Air Resources Board (CARB) leads the fight against air pollution and climate change with strict emissions regulations. Compliance is essential to keeping your truck or fleet on the road while reducing environmental impact. At CMS | California Mobile Smog, we make it easy to meet CARB’s standards with on-site emissions testing, ensuring your business stays compliant and operational. Let us handle the regulations so you can focus on the road ahead.

Certified CARB Compliance Experts
Hassle-Free Fleet Management
Reliable & Transparent Service

Get CARB Compliant Before Entering California – Convenient Testing in Las Vegas

If your trucks operate in California, you need to be aware of the CARB Clean Truck Check (HD I/M Program) and its impact on your business. The state has ramped up enforcement, requiring all diesel trucks over 14,000 lbs to undergo periodic emissions testing to maintain compliance. Failure to comply can result in costly fines, registration holds, and even restrictions on operating within California.

Avoid Delays – Get Compliant in Las Vegas

Las Vegas is a key hub for truckers heading into California, making it the perfect stop to get compliant before you cross the state line. California Mobile Smog (CMS) provides on-site emissions testing, allowing you to stay ahead of regulations without disrupting your route. Whether you manage a fleet or operate a single truck, we offer fast, efficient, and hassle-free testing that keeps your business moving.

Why Get Tested in Las Vegas?

Convenience: We’re strategically located in Las Vegas, just before you enter California. Instead of scrambling for a test station inside California, take care of compliance in advance while passing through.

Avoid Fines & Delays: Non-compliance can lead to significant penalties, registration issues, or being turned away at California weigh stations. Don’t risk costly delays—get tested before you enter.

Fast & Mobile Service: We come to you! Our mobile emissions testing service ensures minimal downtime, allowing you to stay on schedule while remaining compliant.

Our Mission

At California Mobile Smog, our mission is simple:

We understand the challenges of managing a commercial fleet or operating as an independent truck driver. That’s why we strive to eliminate downtime, improve efficiency, and provide a seamless testing experience tailored to your needs. Whether you manage one truck or an entire fleet, CMS is your trusted partner for compliance, convenience, and peace of mind.

Keep your trucks moving by providing on-site, hassle-free emissions testing.
Single Trucks & Fleets – We serve all truck owners, from independent operators to large businesses.
Fast & Efficient Testing – Minimize downtime and keep your trucks on the road.
CARB Compliance Experts – We ensure you meet California’s Clean Truck Check requirements.

Stay Compliant, Stay Operational

Let us help you stay compliant, avoid penalties, and keep your trucks on the road!

CARB Compliance Deadlines to Know

Fleet Reporting & Compliance Fees: Due January 31, 2024 – Emissions Testing Begins: July 1 – December 31, 2024 (at least one test required in this period) Ongoing Testing Requirements: Semi-annual or quarterly, depending on truck model and emissions category

Stay Road-Ready with California Mobile Smog

Don’t wait until it’s too late. Stay ahead of CARB regulations and keep your trucks operating smoothly by scheduling your Clean Truck Check with California Mobile Smog today. Our Las Vegas-based mobile testing service is designed to provide quick, efficient, and compliance-friendly solutions for truckers entering California.

California’s Clean Truck Check (HD I/M Program) is now in full effect, requiring diesel trucks over 14,000 lbs to undergo periodic emissions testing to remain CARB-compliant. Failure to comply can result in costly fines, registration holds, and even being restricted from operating in California.

Fleet Reporting & Compliance Fees – All affected vehicles must be registered in CARB’s Clean Truck Check system, with initial reporting and fee payments due by January 31, 2024.
Testing Requirements Begin Mid-2024 – Trucks must pass at least one emissions test between July 1 and December 31, 2024, with future tests required semi-annually or quarterly depending on their model year and emissions profile.
Non-Compliance Penalties – Missing deadlines or failing to meet emissions standards can lead to steep fines, citations, or even the inability to operate in California.

Don’t wait until the last minute—get ahead of compliance now! Our mobile emissions testing service ensures that your single truck or entire fleet meets CARB regulations without disrupting your operations. We bring the test to you, saving you time, money, and the hassle of searching for an approved testing site.

About Our Company

Why Choose Us?

On-Site Convenience

We come to you! No downtime, no hassle—get your emissions test done in Las Vegas or if

Single Trucks & Fleets

Whether you own one truck or manage a fleet, we offer tailored solutions to keep you compliant.

Fast & Efficient Service

Get tested and back on the road with minimal downtime.

STAY COMPLIANT

Clean Truck Check Requirements

Clean Truck Check applies to almost all diesel, alternative fuel, and hybrid trucks and buses, with a GVWR over 14,000 pounds operating on public roads and highways in California even if they are not registered in California. This includes government vehicles; motorcoaches; transit, shuttle and school buses; hybrid vehicles; commercial and personal use vehicles; California registered motorhomes; and single vehicle fleets. DMV registration holds will apply to vehicles that do not meet Clean Truck Check requirements.

For more information on which vehicles are affected by or exempt from Clean Truck Check, visit Clean Truck Check FAQs.

Requirements for Vehicle Owners:

Vehicle owners must take the following steps to comply with Clean Truck Check:

Report affected vehicle(s) in the Clean Truck Check (CTC-VIS) database system.
1. The information needed to report in CTC-VIS is listed within the Database Reporting Requirements.
2. The Reporting Resources (CTC-VIS) page provides video tutorials and helpful information about the reporting process.
Pay annual compliance fee
1. Payments must be made in CTC-VIS. Payments made in other CARB portals will not be accepted
2. The compliance fee can be paid by either a debit/credit card or e-check. Paper check mailing will NOT be accepted.
Submit a passing emissions compliance test by the applicable deadline.
1. Deadlines for each vehicle are in the Testing Details tab on the My Entity page in CTC-VIS
2. Emissions compliance testing and submission of results must be performed by CARB credentialed testers.
3. Semi-annual passing test submission are required for most vehicles (See Clean Truck Check Requirements for Vehicles Subject to Semi-Annual Compliance)
  1. Effective October 1, 2027, test submission requirements increase to four times per year ONLY for vehicles equipped with On-Board Diagnositc Systems (OBD). Deadlines will continue to be shown in CTC-VIS.
4. California registered motorhomes(for recreational and emergency use) and vehicles that meet the agricultural vehicle definition are required to test annually.
  1. Agricultural Vehicles Requirements
  2. Motorhome Requirements