The Arizona Department of Environmental Quality has issued a PM2.5 High Pollution Advisory (HPA) for Saturday, December 21 and Sunday, December 22.

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Firefighters battle steep, rugged terrain as the Horton Fire swells to 500 acres, prompting SET evacuation alerts and an emergency closure in Tonto National Forest.

Highlights: The Horton Fire is currently at 500 acres, 0% containment and 122 personnel.

Alert: PM10 and PM2.5 High Pollution Advisories in effect for Phoenix on Thursday, December 19, 2024

Forecast Discussion

Unfortunately, PM10 and PM2.5 reached the Unhealthy for Sensitive Groups (USG) AQI category again yesterday. Today, we expect similar weather conditions. As a result, there is potential for both pollutants to reach the USG category again today. Therefore, we are issuing a PM10 and PM2.5 High Pollution Advisory for today.

The Arizona Department of Environmental Quality has issued a PM2.5 High Pollution Advisory (HPA) for Thursday, December 19 and Friday, December 20.

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The Maricopa County Air Quality Department has declared a No Burn Day for Wednesday, December 18 due to elevated levels of PM2.5 (smoke).

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