In order to identify groundwater pollution situation in the Yangtze River Delta region, a comprehensive evaluation of groundwater pollution levels and trends, for the prevention and treatment of groundwater contaminated areas and protection of groundwater resources, protect the safety of drinking water to provide a scientific basis. Evaluation of groundwater pollution groundwater pollution investigation is based on information, combined with pollution distribution evaluation areas, land use zoning, Quaternary geology and hydrogeology conditions for diving and confined water (micropressure water, theⅠconfined water, the Ⅱ confined water, the Ⅲ confined water, the Ⅳconfined water) were single index pollution assessment, pollution assessment and classification index comprehensive evaluation of contamination. Analysis using GIS software now mesh contour mapping features, uneven distribution characteristics according to the survey evaluation points, combined with Kriging grid contour analysis, contour drawing methods of operation and functions for analysis, a more accurate summary analysis method is more applicable to the survey points with uneven feature regional comprehensive evaluation of groundwater pollution levels and changing trends. The new method was applied to evaluate the quality of a single index, the antifouling performance evaluation, different types of survey points and projection, and based on results of the analysis developed GPSE-Data system, so that the whole quality of the evaluation process easier and faster.