Average seasonal contents and standard deviations of chemical elements in drinking water samples of Almaty

Water is an important component of all life on Earth, and water pollution with heavy metals can lead to detrimental consequences for public health. The purpose of this study was to determine the health risks caused by trace elements present in the drinking water supply systems of Almaty City. As part of this research, the elemental composition of 78 drinking water samples taken in winter, summer, and autumn of 2023 in different areas of the city was studied.Based on the data obtained, drinking water contamination indices were calculated for heavy metal groups, and the degree of water suitability for drinking purposes was assessed for each sampling point., Inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma optical emission spectrometry (ICP-OES) techniques are used at the Institute of Nuclear Physics for analyzing the elemental composition of liquid samples., , # TRACE ELEMENT COMPOSITION OF DRINKING WATER IN ALMATY

[https://doi.org/10.5061/dryad.d2547d892](https://doi.org/10.5061/dryad.d2547d892)

## Description of the data and file structure

1\. The heavy metal content of hazard classes 3 and 4 should not exceed the Maximum Acceptable Concentrations (MAC) for drinking water adopted in the Republic of Kazakhstan [14, 15].

2\. The heavy metal index (HMI) was calculated for chemical elements belonging to hazard classes 1 and 2, and standardized according to the sanitary-toxicological hazard. The calculation was performed according to the formula [14]:

,                                                                                                                                 (1)

Where Сi – average seasonal concentration of the i-th chemical element, μg/L, MACi - maximum acceptable concentration of the i-th chemical element, μg/L, n– number of analyzed chemi...