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Final report 2025-06-11
Active investigation
On June 11, 2025, at approximately 8:15 a.m., local time, the Austin Powder facility in McArthur, Ohio, experienced an accidental release of nitrogen oxides and nitric acid from an acid s
The U.S. Chemical Safety and Hazard Investigation Board (CSB) is an independent federal agency that investigates serious chemical accidents to determine root causes and issue safety recommendations. It has no regulatory or enforcement authority — its power is the public investigation.
CSB investigation page ↗Source: U.S. Chemical Safety Board. License: CC0 1.0. Related: EPA RMP facilities nearby.