For Dissolved Oxygen (Do) we have terms and definitions in 5 topics. The topics are Dam, Environment, Fish, Sanitation and Water.

Dissolved Oxygen (Do) (Dam)

The amount of free (not chemically combined) oxygen dissolved in water, wastewater, or other liquid, usually expressed in milligrams per liter, parts per million, or percent of saturation.

Dissolved Oxygen (Do) (Environment)

The oxygen freely available in water, vital to fish and other aquatic life and for the prevention of odors. DO levels are considered a most important indicator of a water body's ability to support desirable aquatic life. Secondary and advanced waste treatment are generally designed to ensure adequate DO in waste-receiving waters.

Dissolved Oxygen (Do) (Fish)

The amount of free (not chemically combined) oxygen dissolved in water, wastewater, or other liquid, usually expressed in milligrams per liter, parts per million, or percent of saturation.

Dissolved Oxygen (Do) (Sanitation)

The oxygen dissolved in water, wastewater or other liquid, usually expressed in milligrams per liter or percent of saturation.
The amount of oxygen dissolved in water or other liquids, usually expressed as mg/L or percent saturation.

Dissolved Oxygen (Do) (Water)

The amount of oxygen available to fish and other aquatic organisms. Fish begin to show negative effects when DO falls below 2 milligrams per liter (mg/l) for an extended time. Aquatic plants and algae are important contributors of dissolved oxygen.

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