
Maricopa County’s ozone pollution is high and getting worse – Cronkite News
Maricopa County is failing the Environmental Protection Agency’s latest ozone standards. The EPA has has reclassified the county from marginal to moderate for non-attainment of ozone limits. (File photo by Kasey Brammell/Cronkite News) Maricopa County’s ozone levels are getting worse, harming the health of its 4.5 million residents and threatening to cost the region billions