Evacuation after nitrogen oxide was released from an explosives factory
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Vinton County, OH – June 11, 2025 – A chemical leak at the Austin Powder Red Diamond explosives manufacturing plant in McArthur, Ohio, forced evacuations across Vinton County as a large plume of nitrogen oxide gas spread into the air.
The leak occurred when an unknown contaminant entered a 5,000-gallon tank containing nitric acid, triggering a reaction that released the hazardous gas. The Ohio Environmental Protection Agency warned that exposure to nitrogen oxide can cause respiratory issues, skin burns, and fatigue.
Evacuation and Response
Authorities evacuated a three-mile radius, including the Village of Zaleski, and set up a temporary shelter at Vinton County High School. The Federal Aviation Administration imposed a temporary flight restriction over the area.
Firefighters and emergency crews worked to contain the leak, and by 4:40 p.m., evacuation orders were lifted after air monitoring confirmed safe conditions. Officials assured residents that drinking water and groundwater remain unaffected.
Ongoing Investigation
The Austin Powder plant, established in 1930, is a major explosives manufacturer. Authorities are investigating the cause of the leak and assessing potential environmental impacts.
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