- Associated Press - Friday, May 1, 2015

PHOENIX (AP) - Arizona’s Department of Environmental Quality has issued its first high pollution warning for ozone in 2015.

Officials say a high pressure system affecting valley air flow will cause stagnant air, high temperatures and high concentrations of ozone on Friday. The Department of Environmental Quality recommends people avoid or limit their outdoor activities.

Maricopa County is enforcing a “No Burn Day,” and is urging businesses that generate dust to limit operations. Valley Metro is asking residents to drive as little as possible, avoid waiting in long drive-thru lines, delay large-scale painting projects and seal household chemicals.

The Environmental Protection Agency says high concentrations of ground-level ozone can trigger health problems such as asthma, bronchitis and shortness of breath. Children and older adults are more sensitive to high levels of ozone.

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