Subject area	Environmental sciences
More specific subject area	Chemistry
Type of data	Tables and figures
How data was acquired	The data were collected by 248 samples from groundwater sources during 2017 in the villages of Iranshahr county. The concentrations of 13 important chemical parameters in those samples, including temporary and permanent hardness, calcium and magnesium, iron, nitrate, alkalinity, sulfate and chloride were determined.
Data format	Raw, analyzed
Experimental factors	All water samples in polyethylene bottles were stored in a dark place at room temperature until them analysed.
Experimental features	In this study, all of mentioned parameters in abstract part were analyzed according to the standard methods for water and wastewater treatment handbook.
Data source location	Iranshahr county, Sistan and Baluchestan province, Iran
Data accessibility	Data are included in this article