Harmful chemicals in the air from BP's Whiting Refinery seem to have dissipated — though northwest Indiana and much of the state is still under an air quality alert due to wildfires in Canada.
Severe weather on Sunday caused power outages at the refinery which led to unplanned gas flaring. That’s where excess natural gas produced during oil refining is burned off into the atmosphere.
According to the Indiana Department of Environmental Management, the flaring released high amounts of sulfur dioxide and hydrogen sulfide into the air. Both chemicals can harm your lungs and make breathing difficult, among other things.
The Porter County HAZMAT team also sampled the air and got similar results.
READ MORE: Sulfur smell covering northwest Indiana believed to be caused by BP Whiting Refinery
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IDEM said it will review the refinery's emission reports and take action if there are any violations.
Last month, the Whiting Refinery received the largest federal penalty ever imposed for industrial air pollution in U.S. history.
Rebecca is our energy and environment reporter. Contact her at rthiele@iu.edu or follow her on Twitter at @beckythiele.