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A massive chemical leak at the Austin Powder Company’s Red Diamond facility in Vinton County, Ohio sent shockwaves through the local community on Wednesday, June 11, 2025. The incident, which occurred around 8:30 a.m., prompted widespread evacuations and raised significant environmental and health concerns for residents in the southeastern Ohio region.
The Chemical Leak Incident
According to emergency officials, the leak originated from a 5,000-gallon tank containing nitric acid at the Austin Powder Company’s explosives manufacturing plant. The Ohio Environmental Protection Agency (EPA) reported that 3,000 gallons of nitric acid entered the tank and triggered an unexpected chemical reaction, resulting in the release of a yellow-orange plume of nitric oxide into the atmosphere.
Immediate Response and Evacuation
Local authorities took swift action to protect residents. The Vinton County Sheriff’s Office implemented emergency protocols, including:
- Evacuating the Village of Zaleski
- Clearing residents from Creek Road, Morgan Road, Infirmary Road, and State Route 677
- Establishing an emergency shelter at Vinton County High School
Health and Environmental Risks
Brad Price, Vinton County’s Director of Environmental Health, warned residents about the potential health risks associated with nitric oxide exposure. Acute exposure symptoms could include:
- Irritation to eyes, nose, skin, and throat
- Drowsiness
- Potential unconsciousness
⚠️ Note: If exposed, residents were advised to clean themselves, irrigate eyes with fresh water, and seek medical attention if experiencing lingering symptoms.
Company Background
The Austin Powder Company, established in 1833, is Vinton County’s largest employer, with approximately 250 employees. The facility spans 1,200 acres and produces explosives for mining, construction, and energy industries. This is not the first time the company has faced scrutiny, as they have previously been fined for Clean Water Act violations.
Resolution and Aftermath
By 4:30 p.m. the same day, the evacuation orders were lifted. Emergency management officials confirmed that air monitoring showed levels were within safe limits. The U.S. Chemical Safety Board (CSB) has since launched a formal investigation into the incident, expressing concerns about the chemical release.
The incident serves as a stark reminder of the potential risks associated with industrial chemical manufacturing and the importance of robust emergency response protocols.
What caused the chemical leak?
+The leak was caused by an unexpected chemical reaction when 3,000 gallons of nitric acid entered a 5,000-gallon tank, generating nitrogen oxide gas that was vented into the atmosphere.
Were there any injuries?
+According to emergency officials, no injuries were reported during the incident. The quick evacuation and response helped prevent potential health risks.
Is the area safe now?
+Authorities lifted the evacuation order after confirming that air quality levels were within safe limits. However, the U.S. Chemical Safety Board is conducting an investigation into the incident.