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Maricopa County Homepage   MARICOPA COUNTY
Air Quality Department, Bob Huhn, PIO
1001 North Central Avenue
Phoenix, AZ  85004
Ph 602-506-6713

No Burn Day restriction information

During the winter months, when air pollution levels are on the rise and weather conditions create dry, stagnant conditions, the Maricopa County Air Quality Department will issue a No Burn Day restriction.  Restrictions last for a 24-hour period and include a ban on woodburning activity including fireplaces, fire pits or open outdoor burning.  The purpose of the No Burn Day restriction is to avoid adding pollution to our air when the forecast suggests air quality will approach or exceed the federal health standard.

Use this helpful guide to find out if today is a No Burn Day:

Log on to  The home page will show you if any restrictions are in place at the top of the page and on the right side of the page in the Clean Air Make More Desktop Widget.

Sign up to receive email alerts or text messages when a No Burn Day is issued.  Visit and click “Make the Commitment.”

Download the Clean Air Make More Desktop Widget.  The widget sits on your computer desktop (once downloaded) and automatically updates with the current air quality forecast and restrictions.  Find step-by-step instructions for the download on our website here:

Not by a computer?  Call the Maricopa County Burn Line at (602) 506-6400 for a recorded message in English and Spanish.

You may report an air quality problem or polluter at any time by calling the Maricopa County Air Quality Department at (602) 372-2703 or file online at under the Contact Us/Report a Violation tab.

PARTICULATE MATTER BACKGROUND:  State and county agencies measure PM-10 and PM-2.5 which are extremely small solid particles and liquid droplets found circulating in the air.  PM, or particulate matter, comes from either combustion (cars, industry, woodburning) or dust stirred up into the air. High levels of PM are typically created when the air is especially stagnant or especially windy.

PM-10 stands for particulate matter measuring 10 microns or less.  PM-2.5 stands for particulate matter measuring 2.5 microns or less.  To put this in perspective, one strand of human hair is 70-100 microns in size. 


The Arizona Department of Environmental Quality [ADEQ] provides a daily forecast for air quality.   When conditions exist, ADEQ will issue high pollution advisories or health watches.  Daily air quality forecasts are on ADEQ’s Web site at  or by calling (602)771-2367. Those interested in receiving the air quality forecast via email can subscribe to

ADEQ’s forecast list at and text alerts at

The Maricopa County Air Quality Department issues No Burn Day restrictions based on a high pollution advisory or health watch.  These No Burn Day restrictions typically occur during the winter months.  To find out if any burn restrictions are in place, call 602-506-6400 or visit  Information is given in both English and Spanish.

To learn more about the Maricopa County residential woodburning restriction ordinance, view a copy on our website  Click on the direct link to the residential woodburning restriction ordinance:

Valley Metro/RPTA provides eco-friendly public transit options to residents of greater Phoenix and Maricopa County, including a clean-fuel bus fleet, low-emissions light rail, online carpool matching and bus trip mapping, and bicycle and telework assistance. Funding is provided by local, state and federal revenues; and administered by a board of 15 governments working to improve and regionalize the public transit system.


Media contacts:

Arizona Department of Environmental Quality [ADEQ]

Mark Shaffer - 602-771-2215 desk / 480-433-9551 cell

Maricopa County Air Quality Department

Holly Ward - 602-506-6713 desk / 602-526-7307 cell

Valley Metro

Susan Tierney - 602-262-4668 desk / 602-292-4093 cell




About Maricopa County Air Quality Department

The Maricopa County Air Quality Department is a regulatory agency whose goal is to ensure federal clean air standards are achieved and maintained for the residents and visitors of Maricopa County. The department is governed by the Maricopa County Board of Supervisors and follows air quality standards set forth by the federal Clean Air Act.


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