It is well known that a large quantity of water is used in dyeing process of fibers. Water resources (rivers, lakes, underground water etc.) are polluted to a major extended by textiles industries. In these a large number of process occurs which uses water in hug quantity for washing, bleaching etc. In dyeing process, a large volume of water is used and when it mixed with other water resources it polluted that water also which effect the human as well as aquatic life. A large number of the of the methods are used to check purity of water, some of them are pH, COD (chemical oxygen demand), BOD (biological oxygen demand), TDS.