About JTD Clean Truck Check – Mobile CARB Compliance Specialists
5 K +
Trusted Customer
10+
Years Of Experiences
Opacity Testing – Experts in Diesel Truck Emissions Since 1998
For over 25 years, JTD Under Pressure has provided precise diesel truck opacity testing, ensuring CARB compliance, environmental responsibility, and reliable results for fleets of all sizes.
Mobile Opacity Testing for Maximum Convenience
JTD offers mobile opacity testing at your location, performing three thorough tests per vehicle, delivering detailed reports, saving fleets time, and simplifying CARB compliance management effortlessly.
Comprehensive Fleet Compliance Solutions
From scheduling to on-site inspections and free retesting, JTD delivers complete fleet compliance solutions, keeping vehicles CARB-compliant, operationally efficient, and fully documented year after year.
Dependable Fleet Compliance Solutions
JTD provides accurate, reliable opacity testing and emissions compliance services for diesel fleets. We handle every detail, ensuring your vehicles meet CARB standards efficiently and consistently.

Mobile Opacity Testing
Our mobile service comes directly to your fleet, performing thorough emissions tests on each vehicle. Minimize downtime while maintaining full compliance and accurate reporting.

Fleet Compliance Support
From detailed multi-page reports to free retesting after repairs, we ensure every truck in your fleet stays compliant. Our team makes fleet management easy and stress-free.

Precision Testing & Reliable Reporting
Every inspection is performed with state-of-the-art opacity meters and professional expertise. Fleets trust JTD for accuracy, convenience, and dependable compliance results year after year.
Where Expertise Meets Every Project
Step 1
Contact JTD to book a convenient time for our mobile opacity testing service. We coordinate with your fleet schedule to minimize downtime and disruption.
Step 2
Our certified team arrives at your location to perform thorough opacity tests on each diesel truck using state-of-the-art equipment for accurate emissions measurement.
Step 3
After testing, we provide a detailed multi-page report for every vehicle. These records help you maintain CARB compliance and ensure your fleet documentation is complete.
Step 4
If any unit fails the test, we offer free retesting after repairs, ensuring your fleet meets all regulatory standards without added stress or cost.
Client Experiences With Our Compliance Services
Frequently Asked Questions
Ensure your fleet stays compliant, efficient, and environmentally responsible with answers to common questions about opacity testing services.
Schedule Your Fleet Testing Today
Keep your diesel fleet compliant, efficient, and environmentally responsible with mobile opacity testing. Quick, accurate, and convenient service at your location.