Arizona Clean Air
On PM-10 High Pollution Advisory (HPA) Days (not ozone HPA days) the use of off-highway vehicles is restricted to official roads and right-of-ways in the space known as Area-A. The area includes all of the Phoenix Metro areas, and parts of Pinal County.
Resources and Information
All OHV users need to know this information as dust issues are becoming a problem in areas, outside of Maricopa County.
1990 – The Clean Air Act (CAA) was established to address the nation’s problems with air pollutants. The Act set primary and secondary standards for the amounts of any pollutant that can be in the air anywhere in the United States.
2009 – The Maricopa county non-attainment area is classified as basic and is required to reach attainment of the standard at all ozone monitors
2010 – Some of the state measures to combat PM-10 include a Dust-Free Certification Program; paving or stabilizing dirt roads, alleys and shoulders; and banning the use of leaf blowers and restricting the use of OHVs to official roads and right-of-ways on PM-10 High Pollution Advisory (HPA) Days.