A) 5ppm
B) 19ppm
C) 25ppm
D) 50ppm
Correct Answer: A
Solution :
A BOD level of 1-2 ppm is considered very good. A water supply with a BOD level of 3-5 ppm is considered moderately clean. In water with a BOD level of 6-9 ppm, the water is considered some-what polluted. At BOD levels of 100 ppm or greater, the water supply is considered very polluted with organic waste.You need to login to perform this action.
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