Property owners are required to limit the emission of dust if an open area or vacant lot:
Is at least 0.10 acre, and
At least 500 square feet is being disturbed by vehicles
Dust control measures include preventing vehicle access by installing barriers or fences, or posting no trespassing signs. Areas that have been disturbed by motor vehicles or off-road vehicles can be re-stabilized by surface gravel, dust suppressants, or vegetative cover.
Dust Caused by Trespassers
If trespassers are the source of the dust emissions from a vacant lot or open area, the owner or operator of the area is required to implement dust control measures. Owners or operators are encouraged to notify local law enforcement agencies if the criminal trespass activity continues to occur. (For Arizona statutes regarding trespass, see A.R.S. §13-1502, A.R.S. §13-1503, A.R.S. §13-1504, and A.R.S. §13-1603.)
Responsibilities of Vehicle Owners & Operators
Vehicle owners and operators are responsible for knowing where they are allowed to operate vehicles.
Vehicle owners or operators are not allowed to use motor vehicles on any unpaved public or private property within the unincorporated areas of Maricopa County without lawful authority.