COD systems measure the amount of oxygen being consumed by nutrients and inorganic substances present in untreated wastewater. This leads to an increase in concentration of both Governments strictly control oxygen demanding pollutants, and there are different methods for measuring oxygen demand. BOD (Biological Oxygen Demand) and COD (Chemical Oxygen Demand) are the most widely accepted methods.The COD test has many advantages over the BOD method, as it is more accurate and a lot faster.

COD is measured in both influent and effluent water (before and after treatment). The efficiency of the treatment process is normally expressed as COD Removal, measured as a percentage of the organic matter removed during the cycle. Our COD tests offer: