This document discusses important parameters for water quality used in textile wet processing. It outlines the major water consuming processes in textile industry such as bleaching, dyeing, and printing. The desirable water quality parameters for textile wet processing are listed, including pH between 6.5-7.5, TDS of 300 ppm or less, total hardness of 30 ppm or less. Using hard or unsuitable water can cause defects like shade variation and damage textiles due to precipitation of dyes or metal ions.