Arizona Department of Environmental Quality
ADEQ issues high pollution advisories when the highest concentration of ozone or particulate matter levels may exceed federal health standards.
The Arizona Department of Environmental Quality (ADEQ) has issued an ozone High Pollution Advisory (HPA) for Maricopa County for Wednesday and Thursday, June 29 and 30, 2016. Due to levels expected to accumulate enough to exceed the new, lower federal health standard for ozone, ADEQ may extend the HPA through Friday, July 1, 2016.
ADEQ is extending today’s HPA because of continued stable atmospheric conditions in combination with abundant sunlight. Ozone levels are expected to exceed the federal health standard both today and tomorrow, June 7 and 8.