Özet:

Objective: Bottled waters are widely used in industrialized societies, largely due to convenience and concern over the safety of tap water. However, it is essential to provide healthy drinking and utility water through taps. Water content should be scientifically studied to prevent any negative health consequences. In this study, differences between bottled and tap water are investigated. Methods: The data of this descriptive research was collected between May and September in 2019. Statistical analysis made with R. Descriptive values are stated as frequency, percentage, mean±SD, median. Chi-square tests were used in comparison of categorical variables, nonparametric tests were used for continuous variables. Significance level was p<0.05. Results: Aluminum in Istanbul was significantly lower than Ankara, Istanbul, whereas iron was higher. Izmir's water hardness was higher than Istanbul. While chloride in Istanbul was significantly higher than Izmir, residual chlorine in Ankara was higher than Izmir. Residual chlorine was below 0.5 ppm in 26.0% of Ankara's samples and 15.5% of Izmir's samples. While there was significantly higher nitrate, chromium, arsenic and copper in Istanbul than Istanbul, manganese was lower. The pH of tap water was lower than packaged water. The pH of 4 mineral waters, 11 spring waters were below standards. There was no sample of tap water outside standards. There was less sodium in spring waters than others, less manganese than tap water. In mineral waters, fluoride was higher than others. pH, nitrite are low in tap water; aluminum, chloride, sulfate, calcium, magnesium, iron, conductivity, lead and arsenic was higher. Tap water hardness and lead levels were higher than spring water; and oxidizability was low. There was no difference between packaged-tap water in terms of bicarbonate, chromium or mercury. While colonies were observed in 18.2% of mineral waters and 6.8% of spring waters, there were no colonies in the tap water samples. Conclusion: Since colonies reproduce in some packaged waters, the relevant facilities should be strictly controlled and the use of bottles that have expired should not be allowed. Water networks should be freed from heavy metals and delivered to housing and workplaces with healthy lines.

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