Abstract
Trihalomethanes (THMs) have been assessed as potentially carcinogenic for humans and pose a hazard index for drinking water samples. Three water samples were collected namely - raw water, chlorinated water, and drinking water at the central drinking water plant in Babylon province. These samples were analyzed using Gas Chromatography to determine monthly variations in the levels of THM compounds, including Chloroform, Dibromochloromethane, Bromodichloromethane, and Bromoform. The concentrations varied, with high and low values: Chloroform (17.58, 0.47 μg/l), Dibromochloromethane (7.65, 0.08 μg/l), Bromodichloromethane (4.0, 0.03 μg/l), and Bromoform (0.89, 0.15 μg/l) in chlorine basin and supply pipes during the summer and winter months, respectively. A general pattern in the distribution of trihalomethane compounds at all sites was observed: Chloroform (51%) > Bromodichloromethane (21%) > Bromoform (17%) > Dibromochloromethane (11%). During May and June, the ingestion risks for Chloroform and overall THMs surpassed US EPA guidelines. This information is vital for Babylon water authorities assessing water quality’s health implications.
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