Clean Truck Check in Ontario, CA
Clean Truck Check in Ontario, CA can be done right where your trucks park. We are a mobile tester, so we come to your warehouse, yard or lot and test on site.
Ontario sits where the I-10, the I-15 and the 60 meet, next to Ontario International Airport. We test across the city's three main ZIP areas:
- 91761, south Ontario, including the warehouse districts and Ontario Ranch.
- 91762, central and west Ontario.
- 91764, north Ontario near the airport and Ontario Mills.
Truck emissions testing in Ontario, CA uses the test that matches the engine: a CARB OBD test for 2013 and newer diesel, a diesel smoke test with visual inspection for 2012 and older diesel without OBD, and a visual inspection for older alternative-fuel trucks without OBD. We explain the result in plain English and give the next due date. Call or text (858) 342-8328 or book online.
Near Ontario airport, Ontario Mills and truck parking
If you need a truck smog check near Ontario airport, we come to you. Air cargo operators, freight forwarders and warehouse fleets around ONT can have trucks tested between runs.
The Ontario Mills area is packed with distribution buildings, and we test at those docks and yards too. Owner-operators who use truck parking lots and truck stops off the I-10 can also book a test. Tell us exactly where the truck is parked and when it will be there, and we will meet it.
A mobile truck smog check in Ontario, CA saves the drive to a test site and the wait. For a single truck or a few, we usually fit you into a route that is already in the area. For larger groups, see our fleet testing page.
Owners still need to report vehicles in CARB's CTC-VIS system and pay CARB's annual compliance fee. We help with CTC-VIS questions if you get stuck.
Fleets in Ontario, Chino, Montclair and Upland
Fleet emissions testing in Ontario, CA works best as a planned, recurring visit. We test the trucks at your yard, keep records per truck and VIN, and send reminders before the next test is due.
Fleets get per-truck pricing based on truck count, test type and location. We also offer early-morning visits so a semi truck smog check happens before the first load goes out.
From Ontario we cover the neighboring cities on the same routes: Chino, Chino Hills, Montclair, Upland, Eastvale, Mira Loma and Rancho Cucamonga, plus Pomona just over the county line.
Most covered trucks currently test twice a year. Under CARB's original rule, OBD-equipped trucks move to four tests a year from October 1, 2027, and a bill has proposed cutting testing to once a year, so the schedule may change. Our 2026-2027 deadlines guide explains what to watch.
