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Press Release
Air Quality

ADEQ is issuing an ozone High Pollution Advisory (HPA) for Maricopa County, effective Sunday, Aug. 21, 2016. This HPA is due to ozone levels expected to accumulate enough to exceed the new, lower federal health standard for ozone.

Employers and Travel Reduction Program Transportation Coordinators are advised to activate their HPA Plans immediately. ADEQ further recommends that the general public limit outdoor activity while the HPA is in effect, especially children and adults with respiratory problems.  

ADEQ, MCAQD and Valley Metro recommend residents and businesses use the following tips and resources to reduce ozone pollution and make the air healthier to breathe:

  • Drive as little as possible, carpool, use public transit or telecommute.
  • Re-fuel your vehicle after dark.
  • Avoid waiting in long drive-thru lines.
  • Plan a transit trip or seek a carpool or vanpool | or 
  • Use low-VOC (Volatile Organic Compounds) or water-based paints, stains, finishes and paint strippers and delay big painting projects.
  • Make sure containers of household cleaners, garage and yard chemicals and other solvents are sealed properly to prevent vapors.
  • Learn other ways to help reduce air pollution | Learn More >


High Pollution Advisory or HPA: Notifies the public that the level of an air pollutant is expected to exceed the federal health standard.

Health Watch: Notifies the public that the level of an air pollutant is expected to approach the federal health standard.

OzoneGround level ozone is formed by a chemical reaction among sunlight, nitrogen oxides (NOx) and volatile organic compounds (VOCs).


ADEQ provides a daily forecast for air quality and issues HPAs or health watches when these conditions exist. Please visit  or call 602-771-2367 for tomorrow’s forecast or Subscribe to receive air quality forecasts via email and/or text message.
Contact: Caroline Oppleman – 602-771-2215 desk/602-540-8072 cell

The Maricopa County Air Quality Department (MCAQD) 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. The department offers air quality information and resources on its Clean Air Make More website:
Contact: Bob Huhn – 602-506-6713 desk/602-526-7307 cell

Valley Metro 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 16 governments working to improve and regionalize the public transit system. Please visit to learn more. 
Contact: Seth Polansky – 602-523-6081 desk