Glossary of Water and Wastewater Terms
A B C D E F G H I J K L M N O P Q R S T U V W Y Z5 random terms from our glossary
slaked lime
See hydrated lime.
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.
HTH (high test hypochlorite)
Calcium hypochlorite or Ca(OCl)2.
defining
A process that arranges the activated carbon particles according to size. This process is also used to remove small particles from granular contactors to prevent excessive head loss.
circle of influence
The circular outer edge of a depression produced in the water table by the pumping of water from a well. Also see cone of influence and cone of depression.
