Figure 3. Concentration of As in pre and post in pre and post water treatment at each studied water purification project. Different letters are significantly difference at p<0.01, while same letters are not significantly difference. The straight line denotes WHO guideline value

From

Assessing Risks to Human Health from Potentially Toxic Elements in Drinking Water of Duhok Province/ Kurdistan Region of Iraq

Karzan. Hawrami, Hassan. Mezuri

Journal of Environment Pollution and Human Health. 2014, 2(2), 44-51 doi:10.12691/jephh-2-2-2