Air Quality

The Arizona Department of Environmental Quality (ADEQ) is issuing a PM-10 Health Watch for Maricopa County, effective Thursday, September 21, 2017. This health watch is due to pollution levels expected to approach the federal health standard.

This health watch includes the following restrictions:
Open burning and wood burning fireplace activity is restricted in Maricopa County. This includes individuals and businesses which have burn permits for open burning.

Please take action during the health watch by following the tips below:

The Arizona Department of Environmental Quality (ADEQ) is issuing an Ozone High Pollution Advisory (HPA) for Maricopa County, effective Tuesday, August 29, 2017. This HPA is due to ozone levels expected to accumulate enough to exceed the federal health standard for ozone.

The Arizona Department of Environmental Quality (ADEQ) is issuing an Ozone High Pollution Advisory (HPA) for Maricopa County, effective Friday, August 25, 2017. This HPA is due to ozone levels expected to accumulate enough to exceed the federal health standard for ozone.

The Arizona Department of Environmental Quality (ADEQ) is issuing an Ozone High Pollution Advisory (HPA) for Maricopa County, effective Friday, August 18, 2017. This HPA is due to ozone levels expected to accumulate enough to exceed the federal health standard for ozone.

The Arizona Department of Environmental Quality (ADEQ) is issuing an Ozone High Pollution Advisory (HPA) for Maricopa County, effective Tuesday and Wednesday, August 8-9, 2017. This HPA is due to ozone levels expected to accumulate enough to exceed the federal health standard for ozone.

The Arizona Department of Environmental Quality (ADEQ) is issuing an Ozone High Pollution Advisory (HPA) for Maricopa County, effective Friday, July 7, 2017. This HPA is due to ozone levels expected to accumulate enough to exceed the federal health standard for ozone.

The Arizona Department of Environmental Quality (ADEQ) is issuing an Ozone High Pollution Advisory (HPA) for Maricopa County, effective Thursday, July 6, 2017. This HPA is due to ozone levels expected to accumulate enough to exceed the federal health standard for ozone.

The Arizona Department of Environmental Quality (ADEQ) is issuing an ozone High Pollution Advisory (HPA) for Maricopa County, effective Friday, June 23, 2017. This HPA is due to ozone levels expected to accumulate enough to exceed the federal health standard for ozone.

The Arizona Department of Environmental Quality (ADEQ) is issuing an Ozone High Pollution Advisory (HPA) for Maricopa County, effective Monday and Tuesday, June 19-20, 2017. This HPA is due to ozone levels expected to accumulate enough to exceed the federal health standard for ozone.

 Warmer and dryer weather conditions are expected over the weekend which could slow progress on the Boundary Fire, as fire crews work slowly and methodically to back the fire down the mountain. This will allow for better control reducing the chances of the fire front pushing uphill and creating intense heat which would adversely affect the tree canopy. It is important that fire crews continue with ignitions during dry weather as it allows for consumption of the decadent fuels on the ground, decreasing the heavy accumulation of fuels on the mountain.