COD
Chemical oxygen demand (COD). A bulk parameter that measures the oxygen-consuming capacity of organic and inorganic matter present in water or wastewater. It is expressed as the amount of oxygen consumed from a chemical oxidant in a specific test.
Source
40 CFR § 430.01
Scoping language
In addition to the definitions set forth in 40 CFR part 401 and 40 CFR 403.3, the following definitions apply to this part: