EFFECT OF NALLAHS ON GROUNDWATER IN INDORE CITY

It is generally assumed that ground water is safe (free from pathogens) and does not contain harmful constituents. But this belief is not true under all circumstances. The unscientific disposal of human and animal wastes is found to be the main anthropogenic activity that has lead to the contamination of ground water with micro-organisms, nitrates, etc. To check the level of contamination in Indore city by the seepage of the existing nallahs, a monitoring of ground water quality was carried out for one month January 2017 to February 2017 from eighteen groundwater sources in Indore city. Analysis was carried out for assessment of 21 parameters including mineral, demand, nutrient, bacteriological and metal analysis. The analysis data reveals that the quality of groundwater in Indore city has deteriorated to a large extent making it unfit for drinking and irrigation purpose. The chemical composition of groundwater from basaltic aquifer has severely altered due to the percolation of industrial effluents in the past decades and sewage from existing nallahs into the groundwater.