Alert: PM10 High Pollution Advisory in effect for Wednesday

Notice: Blowing dust possible

Forecast Discussion:
Unfortunately, PM10 exceeded the federal health standard in Phoenix yesterday, the first time since September 2nd, 2018. Strong winds from the traversing trough kicked up dust across the state with Yuma and Hayden also exceeding the health standard. The elevated PM10 levels have continued into this morning, and with strong winds continuing today, we expect hazy conditions throughout most of the day. We are already close to exceeding the health standard again today, and therefore, we are placing a PM10 High Pollution advisory in effect for today.

Breezy winds will continue tomorrow, however, they are not forecast to be strong enough to cause any more blowing dust. This is forecast to allow PM10 levels to drop back into the Moderate AQI range tomorrow, then the Good range by Friday. Good AQI’s should continue through the remainder of the forecast period due to the lack of any significant winds capable of kicking up dust.

Ozone is forecast to stay in the low-to-mid Moderate AQI range through the forecast period. We don’t anticipate ozone increasing too much due to decent ventilation from the exiting trough, as well as another on Friday.

The Arizona Department of Environmental Quality (ADEQ) is issuing a High Pollution Advisory (HPA) for PM-10 effective April 10, 2019, in Maricopa County.

The Arizona Department of Environmental Quality (ADEQ) is issuing a High Pollution Advisory (HPA) for course particulate matter (PM-10) effective April 10, 2019, in Maricopa County. PM-10 is made up of small particles found in dust. ADEQ recommends that people limit outdoor activity while the HPA is in effect, especially children and adults with respiratory problems.

Health Impacts

People most vulnerable to the impacts of air pollution include children, older adults, adults exercising outdoors and people with heart or lung disease and those suffering from asthma and bronchitis. Exposure can increase the number and severity of asthma attacks, cause or aggravate bronchitis or other lung disease and reduce the body’s ability to fight infection. Symptoms may include itchy eyes, nose, and throat, wheezing, coughing, shortness of breath, chest pain and upper respiratory issues. Long-term exposure is linked to premature death in people with heart or lung disease, nonfatal heart attacks, irregular heartbeat and decreased lung function.

Check the Hourly Air Quality Forecast | View >

Please help reduce PM-10 by doing one or more of the following:

  • Avoid dirt roads.
  • Avoid the use of leaf blowers.
  • Ride transit, carpool or telework.
  • Eliminate all unnecessary driving and/or combine trips.
  • Employers and Travel Reduction Program Transportation Coordinators should activate their HPA Plans immediately.

This information was provided by the Arizona Department of Environmental Quality. The full forecast for other areas of the state can be found online.

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