Water Quality Index (WQI) Of Some Wells Located In The Region Of Kani Goma And Kanasura In Sulaimani Governorate

 Nizar Y. HamaSalh

Faculty of Agricultural Science, University of Sulaimani 

A Water Quality Index (WQI) is a useful statistical tool for simplifying, reporting and
interpreting complex information obtained from any body of water. A simple number given by
any WQI model explains the level of water contamination. This study is carried out by using
twelve ecological parameters in evaluating the quality of the ground water for drinking usage,
by choosing four sampling sites in Kanasura and Kanigoma district located in Sulaimani city
during 15 July, 2013 to 1 September 2013. The sampling was repeated after 15 days and the
present study is spread over a period of two months of summer season. The present study aimed
to calculate water quality index (WQI) by the analysis of twelve physico-chemical parameters on
the basis of Weighted Arithmetic Index in order to assess the suitability of water for drinking
purposes and other human uses. These physico-chemical parameters like Electrical
Conductivity (EC), Turbidity, pH, Total Dissolved Solids (TDS), Calcium (Ca2+), Magnesium (Mg2+) , 
Total Hardness as CaCO3, Nitrate (NO3-_N), Nitrite, (NO2-_N), Sulfate (SO4 2-), Chloride(Cl-), 
and Phosphate (PO43-_P). The observed values of these physico-chemical parameters were compared 
with WHO standards. The results showed that water quality varied from good water
to poor water range.

Keywords: ground water, physico-chemical analysis, water quality index (WQI)

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