Microbiological dataset of rural drinking water supplies in Zahedan, Iran

The residual chlorine and microbial quality of drinking water in the Zahedan villages by a number of1221 samples from all 168 villages were collected between 2014–2015. Then the samples were evaluated using 9-tube fermentation methods and portable chlorine method test. Based on the microbial coliform and fecal coliform indices, the data indicated that the maximum and minimum controlling of the bacteria in the distribution network were in the winter (90.62%) and autumn (85.56%), respectively. Also in the reservoirs, the maximum and minimum controlling of the bacteria were in winter (93.49%) and autumn (87.35%), respectively. The residual chlorine was prepared in almost all of seasons.


Specifications
Water microbiology More specific subject area Microbiology Type of data Tables, Figure  How data was acquired Data was collected between 2014-2015, 1221 microbial samples were prepared from the water facilities installed in these villages, and the microbial test was performed by MPN, P-A or MF methods and turbidity, temperature, and HPC tests based on the standard method. Data format Raw, Analyzed Experimental factors The mentioned parameters were analyzed according to the standards for water and wastewater treatment handbook.

Experimental features
The levels of microbial parameters were determined. Data source location Zahedan, Sistan and Baluchistan province, Iran Data accessibility The data are available whit this article Related research article Yousefi et al. [5] Value of the data The water microbial controlling is very important for prepared the safe drinking water.
The data are shown that the microbial water quality commonly prepared in Zahedan, Iran and they have consumed safe water.
The reason for the higher percentage of desirable chlorine in the city of Zahedan in summer is that in the warm seasons, up to 1 mg/l of primary chlorine is due to the prevention of the prevalence of waterborne diseases.
The data are indicated that the operator must more considerate to chlorination of drinking water in autumn season rather than other seasons.
Is the data recommended to the reservoir and distribution of drinking water system need to be improving in the chlorination time.

Data
The residual chlorine and microbial quality of drinking water in the Zahedan villages by a number of1221 samples from all 168 villages were collected (Table 1) . Table 2 shows that the The Chlorometric data of drinking water resources of Zahedan villages, Table 3 shows that The Turbidity data in drinking water sources of Zahedan villages. Data indicated that the maximum and minimum controlling of the bacteria in the distribution network were in the winter and autumn respectively (Table 4). Also in the reservoirs, the maximum and minimum controlling of the bacteria were in winter and autumn respectively (Table 4). And Table 5 shows that the data of HPC microbial population count in reservoirs of Zahedan villages, Table 6 Comparison of desirable microbial index and free chlorine.

Study area description
Zahedan city is located in Sistan and Baluchistan province of Iran encompassing an area of about 55.7 km 2 ( Fig. 1) and its aquifers are located in South-East Iran between the latitudes 29°30 0 45 00 N and longitudes 60°51 0 25 00 E [1,2]. The subjected study area is a semi-flat plain region with a gentle slope toward the south has a warm, temperate climate with an annual average of 18.3°C in which the highest and lowest temperatures are 42.5°C and À 12.6°C, respectively [3,4].

Determination of microbial contamination in drinking water
In order to evaluate the microbial quality of drinking water in villages of Zahedan city, 168 villages were selected as a comprehensive sample of all villages in this city. Between 2014-2015, 1221 microbial samples were prepared from the water facilities installed in these villages, and the microbial test was performed by MPN, P-A or MF methods and turbidity, temperature, and HPC tests based on the standard method [5][6][7][8][9][10][11][12][13][14][15][16][17].

Transparency document. Supporting information
Transparency data associated with this article can be found in the online version at http://dx.doi. org/10.1016/j.dib.2018.08.049.