The second chemical is n't believed to pose new health risks , the CDC said . PPH is not believed to pose any new health hazard for the people of Charleston , the federal Centers for Disease Control and Prevention said . It escaped from the same plant that exploded on January 9 outside Chicago . A FDA official called the late leak ` ` completely unacceptable '' The January 9 explosion prompted a do - not - use order for up to 300,000 people .
The second chemical is n't believed to pose new health risks , the CDC said . It escaped from the same plant that exploded on January 9 outside Chicago . A FDA official called the late leak ` ` completely unacceptable '' The January 9 explosion prompted a do - not - use order for up to 300,000 people .