Water quality describes the condition of the water, including chemical, physical, and biological characteristics, usually with respect to its suitability for a particular purpose such as drinking or swimming.These properties can be physical, chemical or biological factors. Physical properties of water quality include temperature and turbidity. Managing the quality of both surface water and ground-water is vital for sustaining aquatic ecosystems, which is important to protect the considerable diversity of waterway types in Western Australia, the unique biodiversity they support, and the social and economic services they provide to our community. Scientists measure a variety of properties to determine water quality. These include temperature, acidity (pH), dissolved solids (specific conductance), particulate matter.