The paper deals with the results of rainfall data analysis for a period of 31 years (1985 to 2015) in respect of Katthiwada area located in Alirajpur district, Madhya Pradesh, India, with a prime objective to envisage the environmental impacts on the groundwater system of Katthiwada. The rainfall data have been treated to both the mathematical and statistical techniques. The mathematical analysis of rainfall data reflects a fairly good range from 307.2 mm to 1562.3 mm with an average of 835.27 mm. The annual departure with respect to the average value exhibits the nature of positive and negative recharge trends of groundwater system. The cumulative departure indicates trend of decrease and increase in the rainwater to the groundwater system. The statistical analysis of rainfall data reveals accurate value of Mean = 862.85 mm, Median = 884.84 mm, Mode = 950 mm, Standard Deviation = 281.51, Co-efficient of dispersion = 0.326 mm, Co-efficient of variation = 32.62 and Co-efficient of skewness = (-) 0. 30. The statistical treatment of rainfall data affords precise values of recharge trend.The time series analysis of rainfall data enables the delineation of the trends of expected future annual rainfall. The rainfall data analysis points out that higher rainfall values than the average value indicate the period of favourable recharge to groundwater system, whereas, lower values than the average value point out the negative trend of recharge that reflect the shortage of water supply. The future rainfall trend for the five years has been determined as more than the average annual rainfall indicating a positive trend. The rainfall is one of the important hydrometreological factors, which controls the recharge phenomena of the groundwater system. This rainfall factor is also influencing the environment of the society, forest and development of agriculture and vegetation.