Water quality refers to the chemical, physical, biological, and radiological characteristics of water. It is a measure of the condition of water relative to the requirements of one or more biotic species and or to any human need or purpose. It is most frequently used by reference to a set of standards against which compliance can be assessed. The most common standards used to assess water quality relate to health of ecosystems, safety for human contact and drinking water.
New! Stormwater and Water Quality
Water Quality Standards and Classifications
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Content last updated March 2017.
Air, Waste, Water and Land Use Permits and Licenses
Content last updated on July 6, 2015.