Temporal and Spatial Variation of Nitrate and Nitrite Concentration in Drinking Water Resource in Kohgiluyeh County Using Geographic Information System

Background and purpose: Nitrate is one of the pollutants of groundwater resources which is easily found in agricultural and wastewater disposal areas. The aim of this study was to determine the spatial and temporal variations of nitrate and nitrite in drinking water resources of Kohgiluyeh -a city in Iranusing Geographic Information System (GIS). Materials and methods: This cross-sectional study was carried out in 2011 in which 18 sources of drinking water (108 samples) and results of five-year-archived analysis in Water and sewage Co of Kohgiloyeh were studied applying GIS software ver. 9.3, SPSS ver. 16, and Pearson correlation