Mobile Clean Air Checks for Commercial Fleets in California's Central Valley — We Come to You
Running a commercial fleet in California's Central Valley means staying on top of CARB emissions testing requirements — and doing it without taking your trucks off the road any longer than necessary. ST Pros is Central Valley's mobile Clean Air Check provider, bringing professional emissions testing directly to your fleet location throughout Fresno, Clovis, Madera, Selma, Bakersfield, and surrounding communities.
We come to your yard, your business, or your designated fleet location. Your trucks stay where they are. We handle the rest. With over 20 years of experience, a 24-hour inspection turnaround, and the ability to test multiple vehicles in a single visit, ST Pros is the mobile testing partner that keeps your fleet compliant and your drivers on the road.
📞 Call or Text ST Pros Anytime —
559-824-4291 | Fleet Quotes Available
This is paragraph text. Click it or hit the Manage Text button to change the font, color, size, format, and more. To set up site-wide paragraph and title styles, go to Site Theme.
The ST Pros Fleet Advantage
🚛 We Come to You
Your fleet stays at your location. We bring the testing equipment directly to your yard or business — no towing, no trips to a facility.
⏱️ Minimize Downtime
Multiple trucks tested in a single visit. Less time off the road means more loads moved and less disruption to your operation.
📋 CARB Compliance Support
We help eligible fleets and heavy-duty vehicles meet applicable California Clean Truck Check testing requirements efficiently and on schedule.
Services We Provide
Fleet Clean Air Checks
Semi-Truck Testing
On-Site Mobile Testing
24-Hour Inspection Turnaround
CARB Compliance Testing
RV Emissions Testing
Multi-Vehicle Fleet Visits
Convenient Scheduling
This is paragraph text. Click it or hit the Manage Text button to change the font, color, size, format, and more. To set up site-wide paragraph and title styles, go to Site Theme.
How It Works
Call or Text ST Pros
Reach us anytime at 559-824-4291. Tell us your fleet location, the number of vehicles, and your preferred date.
We Schedule Your Visit
We work around your operation's schedule and confirm a convenient appointment for our mobile team to come to you.
We Come to Your Location
Our mobile testing team arrives at your fleet yard, business, or designated location in California's Central Valley.
On-Site Testing
We test each eligible truck or vehicle on-site. A typical Clean Air Check takes approximately 20 minutes per vehicle.
Results Submitted to State
Test results are submitted directly to the state system, updating your vehicle's Clean Truck Check compliance records.
Fleet Back on the Road
With testing complete, your drivers and trucks can get back to work — with documentation for your records available upon request.
Service Areas
ST Pros serves California's Central Valley within approximately a 75-mile radius of Clovis, CA. Our primary service markets include:
- Fresno, CA and surrounding communities
- Clovis, CA (home base)
- Madera, CA and surrounding areas
- Selma, CA and the south Fresno County corridor
- Bakersfield, CA and Kern County
- And additional Central Valley communities within the service radius
Not sure if your location is covered? Call or text 559-824-4291 — in most cases the answer is yes.
Why Fleet Managers Trust ST Pros
20+ Years Experience
Two decades of mobile emissions testing experience serving California's Central Valley. We know CARB requirements and we know commercial vehicles.
Mobile — We Come to You
Our testing team comes directly to your fleet location. No facility visits, no towing, no wasted driver time getting to a test station.
Multiple Trucks in One Visit
Test your entire on-site fleet during a single scheduled visit. Efficient, streamlined, and designed for commercial operations.
Licensed & Insured
ST Pros is fully licensed and insured. Every Clean Air Check is completed by a qualified mobile testing professional.
24-Hour Turnaround
Inspections are completed and results submitted efficiently — with a 24-hour turnaround so your compliance records stay current.
Fleet Pricing Available
Special pricing when multiple vehicles are tested in a single visit. Military discounts also available for eligible customers.
Call Anytime
559-824-4291. We're available for calls and texts to answer questions, schedule appointments, and support your fleet's compliance needs.
Home Page FAQs
What is a Clean Air Check?
A Clean Air Check is emissions compliance testing for commercial, private, or government-owned trucks and heavy-duty vehicles subject to California Air Resources Board (CARB) requirements. ST Pros provides mobile Clean Air Check testing to help eligible fleets and heavy-duty vehicle owners meet applicable CARB Clean Truck Check testing requirements — we come directly to your location throughout California's Central Valley.
Do you come to our fleet location?
Yes. ST Pros provides mobile Clean Air Check testing at your fleet location throughout California's Central Valley. We come directly to your business, yard, or designated fleet location so you can have multiple commercial vehicles tested on-site while helping minimize downtime and keeping your fleet moving.
What areas of the Central Valley do you cover?
ST Pros provides mobile Clean Air Check testing throughout California's Central Valley within approximately a 75-mile service radius of Clovis, CA. We serve Fresno, Clovis, Madera, Selma, Bakersfield, and surrounding communities. Not sure if your location is within our service area? Contact ST Pros today at 559-824-4291 to confirm coverage.
Ready to Schedule Your Fleet Clean Air Check? Call or Text 559-824-4291 — We Come to You.