2, turbidity: an expression of the optical properties of water samples, used to indicate the degree of water clarity and turbidity, is a measure of the degree of water quality is good, one of the important indicators of the Z, but also the assessment of the purification efficiency of the water treatment equipment and evaluation of the state of the water treatment technology is an important basis. The reduction of turbidity means that the water body of organic matter, bacteria, viruses and other microorganisms to reduce the content, which not only improves the disinfection and sterilization effect, but also helps to reduce the generation of halogenated organic matter.
3, odor and taste: the production of water odor is mainly the presence of organic matter, may be a manifestation of increased biological activity or industrial pollution. Public **** change in the normal odor of water supply may be a change in the quality of raw water or water treatment is not sufficient signal.
4, visible to the naked eye: mainly refers to the presence of water, can be observed with the naked eye particles or other suspended substances.
5, residual chlorine: residual chlorine refers to water disinfection by chlorination, after a certain period of time, the amount of chlorine remaining in the water. In the water has a sustained ability to sterilize can prevent the water supply pipeline of its own pollution, to ensure the quality of water supply.