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Reference.org
Water quality
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<p>Water quality refers to the <a href="/facts/Chemical_property/uMVxKspS">chemical</a>, <a href="/facts/Physical_property/ujcMUceW">physical</a>, and <a href="/facts/Biology/1M1ee3pB">biological</a> characteristics of <a href="/facts/Water/0lkXnJPK">water</a> based on the standards of its usage. It is most frequently used by reference to a set of standards against which compliance, generally achieved through <a href="/facts/Water_treatment/nIstBCdG">treatment</a> of the water, can be assessed. The most common standards used to monitor and assess water quality convey the health of <a href="/facts/Ecosystems/kVE8mSmR">ecosystems</a>, <a href="/facts/Safety/jyH5HLSg">safety</a> of human contact, extent of <a href="/facts/Water_pollution/SCUhUYqB">water pollution</a> and condition of <a href="/facts/Drinking_water/FmSJcKGG">drinking water</a>. Water quality has a significant impact on <a href="/facts/Water_supply/1UuexMtl">water supply</a> and often determines supply options. </p>