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  6. What is COD/Chemical Oxygen Demand? An explanation of its correlation with BOD.

What is COD/Chemical Oxygen Demand? An explanation of its correlation with BOD.

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last updated:Feb 14, 2026

ハンナインスツルメンツ・ジャパン
ハンナインスツルメンツ・ジャパン
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COD, what is chemical oxygen demand? About the necessity of measurement.

COD (Chemical Oxygen Demand) is a measure used to assess the degree of water pollution, and with the increasing environmental awareness nowadays, measuring COD is important. On the other hand, BOD (Biochemical Oxygen Demand) is also an indicator that should be pursued, but it has the drawback of requiring a 5-day incubation period for measurement. Let's also look into whether COD can be used as a substitute for BOD. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*

    Water quality testing
化学的酸素要求量.jpg

What is COD/Chemical Oxygen Demand? An explanation of its correlation with BOD.

化学的酸素要求量.jpg
化学的酸素要求量.jpg
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ハンナインスツルメンツ・ジャパン

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Hanna Instruments was born in Italy and is now a measurement instrument manufacturer headquartered in the United States, producing and selling various measuring instruments such as pH meters, conductivity meters, residual chlorine meters, and ion meters. It leads the world in the field of water quality measurement and has grown to become one of Europe's leading electronic analyzer manufacturers. In particular, the pocket-sized pHep product has revolutionized pH measurement, which previously relied on litmus paper, by making it easy to handle with digital display, and has become synonymous with 'pH meter' in Europe. All products are certified with the CE mark (indicating conformity to legal regulations in the European region), and the manufacturing facility is ISO 9001:2008 certified, ensuring that we provide products manufactured to strict quality standards. Our primary goal is to provide cutting-edge technology in user-friendly products, and we strive daily to develop products that meet our customers' needs.

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