Water quality is described as the condition of the water relative to the requirement of one or more biotic species and or to any human need, including chemical, physical, radiological
and biological characteristics. It is most frequently used by reference to a set of standards against which compliance, generally achieved through treatment of the water, can be assessed. The most common standards used to assess water quality relate to health of ecosystems, safety of human contact and drinking water.
The parameters for water quality are
determined by the intended use. Work in the area of water quality tends to be
focused on water that’s is treated for human consumption, industrial and
domestic use or in the environment. Water quality is measured by several
factors, such as the concentration of dissolved oxygen, bacteria levels, the
amount of salt, or the amount of material suspended in the water. In some bodies
of water, the concentration of microscopic algae and the quantities of
pesticides, herbicides, heavy metals and other contaminants may also be
measured to determine water quality.
Although scientific
measurement are used to define water quality, it is not a simple thing to say
that water is good or water is bad, so the determination is typically made
relative to the purpose of the water, drinking, washing, irrigation, processing
and other purposes. Poor water quality can pose a health risk for people and
the ecosystems.
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