Hey Iman Dorri ,  BOD ...

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Hey Iman Dorri , 

BOD stands for the amount of oxygen needed to decompose organic waste in wastewater. As more oxygen is needed as higher is the grade of pollution = BOD level. 

The most common test method used to determine the BOD level is called BOD5 test. In this test the oxygen consumption after 5 days of incubation time is measured. 

You can find more details and explanations in our 3 minute video tutorial here:  BOD tutorial

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