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New laws have been adopted across the Phoenix metropolitan area in response to air quality concerns.

  • Fugitive dust from unstable or disturbed dirt surfaces (such as construction areas, vacant lots, dirt roads, and dirt tracked onto paved surfaces) is the largest man-made contributor to the county’s non-attainment of air quality standards.
  • All sites with disturbed surface areas, regardless of size, must maintain compliance with air quality rules.

The Maricopa County Air Quality Department’s Dust Compliance Division is responsible for improving air quality by protecting the public from airborne particulate matter and enforcing air quality standards.

OHV operation that creates dust and particulate matter outside of acceptable air quality standards is subject to regulation and has resulted in past area closures.

Motor vehicle use on unpaved surfaces is limited in Maricopa County. Before driving, riding, or parking on any land, check with the appropriate land management agency regarding the rules and requirements.

  • You may be subject to fines and penalties if you violate the rules and requirements.
  • On days when a high-pollution advisory (HPA) for particulate matter has been issued by the Arizona Department of Environmental Quality (ADEQ), OHV activities on unpaved surfaces will not be permitted in Area A.
  • If you are planning to drive or ride an OHV within Maricopa County, check first to see if an advisory has been issued by calling 1-800-234-5677, visiting the Maricopa County website, or signing up to receive a text message at the ADEQ website.
  • In addition, cities in Area A now restrict the operation of motorized vehicles on many unpaved roads and vacant lots. Check with your local law enforcement or city office to find out if recreational use is permissible.

Note: Additional restrictions also may be in effect. For example, access restrictions vary according to local, county, or state regulations. Always check for complete information on legal OHV use before you ride.

Arizona Area A Boundaries map
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