Abstract

Providing clean and good quality water is essential for sustaining human health and life, and for ensuring the preservation of ecosystems. The purpose of this paper is to identify the chemical and microbiological characteristics of drinking water source of Cankiri City (as raw and purified) and tap water samples of central Cankiri and its towns. The water quality in Cankiri Province was evaluated by comparing these parameters with permissible limits set by Turkish legislation and World Health Organization (WHO). Raw and purified water samples were analyzed for chemical and microbiological qualities, trace metal, pesticide, polycyclic aromatic hydrocarbon (PAH), trihalomethane (THM), and benzene contents. These analyses indicated that the parameters exceeded those of the Turkish legislation (phenolic substance, biochemical O2 demand, Mn, Se, fecal coliform) and the WHO guidelines (pH, phenolic substance, Cd, Se, fecal coliform). In this study, tap water samples were also collected from 50 sampling sites from central Cankiri and its towns during 2010. In these samples, chemical characteristics (bromide, free chlorine, nitrate and nitrite), carbamate, herbicide and fungicide contents, and microbiological contaminants were investigated. In the tap water samples, it was found that free chlorine concentrations exceeded the Turkish guidelines. Escherichia coli, total coliform and enterococci were used as indicators of possible sewage contamination due to inappropriate water distribution. Our results also indicated that significant microbiological contaminations in the tap water samples were above the guidelines for drinking water given by the Turkish legislation and WHO, and might pose a health risk. This investigation of drinking water samples of the Cankiri Province would point to the need of a new drinking water treatment strategy to ensure the safety of consumers.

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