Use of grey system for assessment of drinking water quality: A case S study of Jiaozuo city, China

In this study, the water standard is interval rather than point, so a new analysis method which proposed from the grey system theory - Grey Relational Analysis (GRA) based on the distance of a point to the interval, is used for assessment of drinking water quality in Jiaozuo city China; This method is simple and has good operability, and the physics significance was clear. Good results are achieved. The assessment results provide a scientific reference for the integrated planning, management and rational use of drinking water source in Jiaozuo city.