Around 8:30 a.m., an estimated 3,000 gallons of nitric acid leaked from a 5,000-gallon tank at the explosives manufacturing facility, which supplies products for mining and construction. The incident created an orange plume of hazardous fumes visible in the sky, prompting emergency crews to evacuate roadways and residents in the nearby Village of Zaleski, home to roughly 750 people. Evacuees were directed to Vinton County High School for shelter.
In response to the toxic spill, the Federal Aviation Administration (FAA) established a 30-nautical-mile no-fly zone around the site, effective until June 12, though relief flights were permitted.
The Ohio Environmental Protection Agency (EPA) confirmed that the leak has been contained, but the source remains under investigation.
Photos from the scene showed thick orange and brown fumes drifting into the air. According to the CDC, nitric acid exposure can cause serious health effects, including burns, dizziness, respiratory issues, and fluid buildup in the lungs.
Officials advised anyone exposed to flush their eyes, wash their skin, and seek medical attention if symptoms persist.
While no injuries have been reported, emergency officials said the plume has shifted south due to wind changes. Authorities will continue to monitor air quality to determine when it is safe for residents to return.