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SMOG CHECK PROGRAM




 

The California Smog Program

The Smog Check program is designed to clean air and help California meet requirements of the Federal Clean Air Act (BAR 90 - 1990).  All California registered vehicle owners must obtain and pass a Smog Check certificate to register their vehicle with the State.

Smog is a serious health hazard contributing to thousands of deaths each year in California.  Studies show that motor vehicles are responsible for more than half the air pollution in our state.  In fact, most of the vehicular smog is caused by just 10 to 15 percent of vehicles - those with the worst emissions problems.

Since the creation of the original Smog Check program in the early 1980's, our understanding of smog has evolved considerably.  We understand the critical impact of oxides of nitrogen (NOx) and can now accurately measure vehicular NOx emissions in the shop environment.  Today's vehicle emissions equipment is more sophisticated, and proper maintenance, can substantially reduce NOx emissions in our air.

Vehicles registered in areas of the state that have not attained federal air quality standards ("Enhanced Program Areas") are tested using a BAR-97 Emission Inspection System.  Enhanced areas usually reflect a more densely populated community in addition geographic factor will also impact air quality.

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