Realization . . . Have Concern about your Natural Ground water ? ? ?
T here are many ways drinking water may become contaminated. Contamination may result from chemical sources. Chemical contamination can result from human activities , such as chemical fertilized agricultural or industrial operations, or from improper chemical disposal at home. Increasing application of nitrogen fertilizers in the irrigated lands of the studied area is likely to create a blanket non-point source of nitrate. Groundwater contamination from fertilizers, in this context, has been reported as derived from N0 3− , K + and 18 0 composition of groundwater. The data suggest both point and non-point sources of groundwater pollution. Thirty-three percent of the groundwater samples showed nitrate contents exceeding the general acceptable limit of 20 p.p.m. and 15% of the samples crossed the maximum permissible limit of 45 p.p.m. High nitrate levels are associated with high δ 18 O values, clearly indicating that significant quantities of evaporated (isotopical