About Smog 'N Go

Smog 'N Go, LLC is an emissions testing company based in the Sacramento area of Northern California. We opened our first shop in January of 2000, and currently we have 5 shops.

Smog ‘N Go performs more vehicle emissions tests than any other company in California.

How We are Different

Our goal from the very beginning has been to be California's #1 place for emissions testing.

The idea for Smog ‘N Go started back in July of 1998. Jack Williams was waiting to get his wife’s car to be tested. As he sat waiting for the test to be completed, Jack made a mental list of all the ways he thought the experience could be improved. A year and a half later, Smog ‘N Go opened, implementing Jack’s ideas for a better customer experience.

Faster and More Efficient

Our motto is “In and Out in a Hurry”. We can smog most vehicles in less than 15 minutes, and it’s rare to wait more than half an hour, even when we are busy.

Headshot Photo of Jack Williams - Founder of Smog 'N Go
Jack Williams - founder of Smog 'N Go

We know your time is important, so we provide an experience that is unequal to our competition.

Dedicated Service Writers: Typically, with most smog shops, the same employee handles the customers and does the smog checks.

At Smog 'N Go, each of our locations has friendly service writers whose main job is to take care of the customers, leaving the technicians free to take care of your vehicle. The process should not have to grind to a halt every time the phone rings or another customer arrives.

Multiple Pull-through Bays: The typical smog shop is built from a converted garage or gas station. Often there is only one service bay where the vehicles have to be pulled in and backed out.

Smog ‘N Go facilities are built from the ground up with efficiency in mind. Each shop is built with multiple, pull-through bays, so we can test more than one vehicle at a time, and we don’t have to shuffle vehicles around. Even when we are busy, we can get you in and out in a hurry.

Smog 'N Go in Rocklin


Most of our business comes from repeat customers. Here are some of the things we do at Smog 'N Go to keep people coming back:

Open Longer: We stay open until 6:00pm, Monday through Friday, and until 5:00pm on Saturdays. We are open longer so you don't have to take time from work to get your vehicle tested.

Clean, Comfortable Waiting Rooms: Each of our locations has a large, comfortable waiting room, clean floors, rest rooms, and large windows so you can watch your vehicle as it's smogged. Our waiting room is air conditioned in the summer, and heated in the winter.

Great Service: We are very selective about the people we hire. We do our best to staff our locations with friendly, knowledgeable employees to get you in and out quickly and as efficiently as possible.

We Do More Smog Checks Than Anyone Else

There are over 7,000 smog shops in California, but no one does more smogs than we do. We have completed over one million smog checks since opening our first location.

Giving back to the community

Ever since we first opened in 2000, Smog 'N Go has been giving back to the communities that have helped us grow. We've helped local schools, sponsored local youth sports teams, and contributed to local charities.

Our two main charitable focuses have been Chair the Hope. and the Make-A-Wish Foundation of Northern California.

Make-A-Wish Photos at our Elk Grove and I5 Location

Smog 'N Go provides an opportunity for our customers to make a donation to Chair the Hope or Make-A-Wish when they get a smog check. Through the generosity of our customers, we've been able to raise over $756,000 for Make-A-Wish since we opened in 2000, and over $86,000 for Chair the Hope since 2022.