Air Care Colorado Emissions Testing Station

Air Care Colorado Emissions Testing Station in Longmont has earned a 4.4-star rating across 867 reviews, making it one of the most-reviewed smog inspection stations in Boulder County. The station handles emissions testing for most gasoline-powered vehicles required to meet Colorado's vehicle inspection program. Located in Longmont, the facility serves drivers from across the northern Front Range who need official emissions certification for registration renewals.

The station distinguishes itself by maintaining real-time wait time estimates that update approximately every 20 minutes, viewable on their website map. This transparency helps drivers plan their visit around their schedule rather than guessing at queue lengths. However, the Longmont location does not accommodate vehicles with low-profile rims 17 inches or larger, or wheels exceeding 34 inches, which require special dynamometers available only at their Sheridan, Boulder, Ken Caryl, or Fort Collins stations.

Multiple reviewers describe efficient experiences at this facility. One customer who visited on a Tuesday afternoon at 2 pm reported being in and out in just 10 minutes, praising the workers' efficiency. Another visitor arriving around noon on a Monday completed their entire inspection in about 20 minutes. The most recent dated review, from August 2025, notes the team churns through cars quickly.