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Chemical Oxygen Demand (COD) is used as a measurement of pollutants in municipal and industrial wastewater.

Using the dichromate-reflux colorimetric method, HANNA’s COD meters are easy to use and can measure over 40 specific pollutants, such as Ammonia, Nitrogen and Phosphorus (see individual specifications), which may be responsible for oxygen starvation in water systems. Effective monitoring and control of pollutants can vastly improve the health of aquatic ecosystems and sewage treatment plants.