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In Area A during days when HPAs have been called for particulate matter, it is illegal to use an off-highway vehicle (including an all-terrain vehicle or an off-road recreation motor vehicle) on an unpaved surface that is not a public or private road, street, or easement—except at designated locations and events where dust controls are in place.
ADEQ is now offering a text-messaging service to inform people when an HPA is being issued for the Greater Phoenix Area. If you sign up for this service, you will receive a text message on your cell phone or small-message service (SMS) wireless device by mid-afternoon on the day before the HPA is issued.

While ADEQ charges no fee for this service, the fees set under your cell phone or wireless device plan will apply.

To sign up or for more information, contact:

Arizona Dept. of Environmental Quality
Phoenix Main Office
1110 W. Washington St.
Phoenix, AZ 85007