Calcium and Magnesium in Ilam Drinking Water Sources during 2009-2013using Geographic Information System (GIS)

Physicochemical quality of water from the acceptability point of view is essential for consumers; protecting thehealth of consumers and maintenance of water supply systems. The aim of this study is to determine temporal andspatial variations of Calcium and Magnesium in Ilam drinking water sources using the GIS system.This cross-sectional study was conducted on 20 drinking water sources in Ilam city and the 5 years results by waterand wastewater company archive GIS software version 3.9 were analyzed via SPSS version 16 as well as one-wayvariance analysis. Water and wastewater sampling and measurement were conducted in order to verify the data byresearchers according to standard methods.Based on interpolation map, the maximum calcium and magnesium contents are related to western and centralregions. ANOVA test showed that there no a significant difference between the mean calcium variable verificationtest in summer during 2009-2013 and at 95% level. (P=0.760> 0.05). The one-way analysis of variance showed thatthere is a significant difference between the average magnesium variable in summer during 2013-2009 years and theverification test at 95% level. (P=0.019<0.05).According to maps 1 and 2, in all areas, the mean calcium content is lower than the maximum allowed. And thewater quality is desirable based on the parameters. The results of the verification test in 2015, compared with theinternational standard WHO, showed magnesium concentrations are higher than is desirable maximum in mostsources

Keywords:

Calcium and Magnesium , GIS , Water , Ilam