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What is the average dissolved oxygen content in water?

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What is the average dissolved oxygen content in water?

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  1. No such thing exist.  DO concentrations vary depending on water temperature, turbidity, time of year, wind, salinity and several other factors.

    The DO content of tap water should be about 5 to 7 ppm(parts per million).

    Most aquatic life forms require DO content above 3 ppm.  Most fish require DO content about 5 ppm and higher.

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