Estimating the Change in Groundwater Parameters

I am part of a team trying to investigate the quality of ground water in one of the states in Nigeria via physicochemical and bacteriological parameters' analysis. During the two main seasons, these parameters may change; so samples are taken separately during the two seasons and in-between, in a year and analyzed. It is difficult to do this process every year to detect any change in ground water quality to update previous data. Is there any geological algorithm or application or equipment that can estimate the change in ground water quality in specific and characterized region/area, in the subsequent years, in this case?