Nitrate and residual chloride contents in household water storages in Al-Diwaniya province, Iraq.

Nitrate and Residual Chloride have a great effect on human health when taken with drinking water in high concentrations. Therefore, this study is an attempt to evaluate the concentration of Nitrate and Residual Chloride in drinking water. Water samples were collected from household tanks in Al-Diwaniyah city-Iraq for six months (from January to June 2019). The study included most of Al-Diwaniyah neighborhoods, they numbered 15, and they are Al-Orouba First, Al-Orouba Second, Al-Orouba Third, Al-Dhubat, Al-Askari (Al-Sadr Fourth), Al-Jazzier, Umm Al-Khail, Al-Furat, Al-Judida, Al-Jamaa, Al-Nahda, Al-Iskan, Al-Taqiya, Sob Al-Shamiya, and Al-Jumhouri. The results of this study confirmed the variation in nitrate and residual chloride concentrations with different study months and sample locations. The lowest nitrate concentration was 3.19 mg/l in February in the Al-Jamaa neighborhood. The highest concentration was 5.15 mg/l in January in the Al-Taqiya neighborhood. The residual chloride reached its highest concentration of 4 mg/l in January in the Al-Jazzier neighborhood and the lowest concentration was 0 mg/l in May and June in the Al-Taqiya neighborhood and June in the Umm Al-Khail neighborhood. The results also showed that the nitrates did not exceed the Iraqi standard specification and international standards. While chlorine exceeded the specifications as there was no residual chloride in some samples or it did not reach the minimum required concentration. [ABSTRACT FROM AUTHOR]