Chemical Oxygen Demand

What is COD (Chemical Oxygen Demand)?

COD stands for Chemical Oxygen Demand. A measure of the total chemicals (organic and oxidizable inorganic) in wastewater, in mg/L. High in textile dye-house effluent.

TOC
A measure of all organic compounds dissolved in water. Critical for semiconductor ultrapure-water and pharma systems where organics must stay below ppb levels.
BOD
The amount of oxygen microbes need to break down the organics in a water sample. High in food-processing effluent.
ppb
Concentration unit equal to 1 microgram per liter. Used for ultrapure water targets in semiconductor and pharma applications.

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