Water and Wastewater Terms Beginning I

A B C D E F G H I J K L M N O P Q R S T U V W Y Z

IDLH (immediately dangerous to life or health)

The atmospheric concentration of any toxic, corrosive, or asphyxial substance that poses an immediate threat to life, would cause irreversible or delayed adverse health effects, or would interfere with an individual’s ability to escape from a dangerous atmosphere.