The current research describes the application of the water quality index (WQI) based on the collection of 50 samples of water sample for 10 wells for five months in the village of Kakhirta in Al-Ayadiyah subdistrict, northwest of Nineveh Governorate. The model was applied using 13 parameters (pH, TDS (total dissolved salts), DO (dissolved oxygen), T.A (Total Alkaline), Cl, Ca, Na, Mg, K, PO4, SO4, TPC (Total Plate Count), and F. Colif. (Faecal coliform) depending on the results obtained from the model. The groundwater quality ranged between (218 - 765), which indicates deterioration in water quality due to the high numbers of bacteria TPC and F. Colif., as well as the high total alkaline T.A and hypoxia in the water more the recommended limits for drinking water.
In this research, the Water Quality Index (CCME) was used to determine groundwater suitability for drinking and domestic purposes. in the village of Shouira in Talafar district, northwest of Nineveh Governorate. This was carried out by subjecting 50 samples of groundwater to biological and chemical analysis. These parameters include pH, TDS, O2, T.A, Ca, Mg, Na, K, Cl, PO4, SO4, TPC, and F. Colif. The results show that groundwater is not suitable for drinking. It was found that the low value of CCME, which ranged between (17.9 - 32.7), is mainly due to the high value of most of the values of the measured parameters and the low oxygen values.
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