Maricopa County

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 30, 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 Friday, June 2, 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 Wed., May 3, 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) has issued a Ozone High Pollution Advisory for April 17 and 18, for areas in and bordering Maricopa County.

These HPAs are 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 a High Pollution Advisory (HPA) for Sun., Dec. 18, 2016, for fine particulate matter(PM2.5) for Maricopa County, Arizona. This HPA is due to particle pollutant levels expected to accumulate enough to exceed the federal health standard for PM2.5.

During this HPA, Maricopa County Air Quality Department (MCAQD) declares a “No Burn Day” in Maricopa County, which puts the following mandatory restrictions in effect:

The Arizona Department of Environmental Quality (ADEQ) is issuing an ozone High Pollution Advisory (HPA) for Maricopa County for Saturday, August 26, 2016.

These HPAs are due to ozone levels expected to accumulate enough to exceed the new, lower federal health standard for ozone.

The Arizona Department of Environmental Quality (ADEQ) is issuing a Health Watch for Saturday, August 20 and an ozone High Pollution Advisory (HPA) for Maricopa County through Sunday, August 21, 2016.

These HPAs are due to ozone levels expected to accumulate enough to exceed the new, lower federal health standard for ozone.