The searing summer in St. Louis has helped drive ozone levels to the highest levels seen in five years, killing the region’s chances for meeting federal standards any time soon.
Data from air monitors across the region quantify the extent of the problem. From April 1 through the end of August, the 11 ozone monitors recorded 172 instances in which concentrations exceeded federal standards. And there’s still almost two months remaining before the ozone season ends on Oct. 31. Ground-level ozone, a colorless gas, can trigger asthma attacks and aggravate other respiratory ailments.
“We are continuing to have one of the worst ozone seasons in recent years,” Wendy Vit, air quality planning section chief for the Missouri Department of Natural Resources, told members of the state’s Air Conservation Commission during a meeting in Jefferson City last week.
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