If exams are submitted:	Course certificates will be mailed:
Before December 19	Before December 22
After December 19	Early January

If exams are submitted:

Course certificates will be mailed:

Before December 19

Before December 22

After December 19

Early January

Water and Wastewater Terms Beginning B

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

BOD (pronounce as separate letters)

Biochemical oxygen demand is a measure of the amount of dissolved oxygen (DO) consumed (exertion) by aerobic organisms while stabilizing decomposable organic matter under aerobic conditions. The BOD value is commonly expressed as BOD₅ and refers to the milligrams of oxygen consumed per liter of water during a 5-day incubation period at 68°F (20°C). In decomposition, organic matter serves as food for the organisms and energy results from its oxidation. BOD measurements are used as a measure of the organic strength of wastes in water. Also see COD.