Environmental impact of dissolved oxygen
Proper dissolved oxygen is essential for good water quality, and all forms of life require oxygen.
The natural stream purification process requires proper oxygen content to supply aerobic life forms.
If the oxygen content in the water is less than 5.0 mg/L, it is difficult for aquatic organisms to survive, and the lower the concentration, the more difficult it is.
If the oxygen content is less than 1-2 mg / L and lasts for several hours, it will lead to a large number of deaths of aquatic organisms.