Data on physicochemical quality of drinking water in the rural area in Divandarreh county, Kurdistan, Iran

Good quality of drinking water is very important in the maintenance of human health. The gathered data from the present work was used to evaluate the quality of drinking water resources in the rural villages of Divandarreh, Iran. Physicochemical quality of water was determined by a collection of 35 random samples during dry and rainy seasons in 2015. The APHA approach was used to determine the physicochemical parameters of the samples. The results showed that the average concentration of Ca, Mg, Na, K, Cl, SO4, TDS and TH during dry season was 85.64 mg/l, 13.41 mg/l, 34.11 mg/l, 2.8 mg/l, 9.9 mg/l, 45.7 mg/l, 326.06 mg/l and 269.61 mg/l, respectively. Also, the average concentration of the parameters during rainy season was 77.3 mg/l, 18.27 mg/l, 30.3 mg/l, 1.9 mg/l, 12.54 mg/l, 39 mg/l, 269.1 mg/l and 316.17 mg/l, respectively.


a b s t r a c t
Good quality of drinking water is very important in the maintenance of human health. The gathered data from the present work was used to evaluate the quality of drinking water resources in the rural villages of Divandarreh, Iran. Physicochemical quality of water was determined by a collection of 35 random samples during dry and rainy seasons in 2015. The APHA approach was used to determine the physicochemical parameters of the samples. The results showed that the average concentration of Ca, Mg, Na, K, Cl, SO 4 , TDS and TH during dry season was 85.64 mg/l, 13.41 mg/l, 34.11 mg/l, 2.8 mg/l, 9.9 mg/l, 45.7 mg/l, 326.06 mg/l and 269.61 mg/l, respectively. Also, the average concentration of the parameters during rainy season was 77.3 mg/l, 18.27 mg/l, 30.3 mg/l, 1.9 mg/l, 12.54 mg/ l, 39 mg/l, 269.1 mg/l and 316.17 mg/l, respectively.  Table   Subject area  Chemistry  More specific subject area Drinking water quality  Type of data  Tables and map  How data was acquired Analyses of temporary hardness, calcium, magnesium were conducted using titration method.

Value of the data
Based on the obtained data proper measure can be taken in order to deliver appropriate water quality to consumers.
The collected data can be used for the preparation of research map in the field of water treatment by another researcher.
The collected data can be useful for the codification of local standards along with other researcher's data.

Data
The specified parameters in the experiments are included calcium ion, magnesium ion, sodium ion, chloride ion, sulfate ion, temperature, total alkalinity, electrical conductivity (EC), total dissolved solids (TDS) and pH analyzed according to standard methods for the examination of water and wastewater [1]. Water stability was evaluated based on RSI, LSI, PSI, AI and LS. The sampling points and study area was shown in Fig. 1. The chemical and physical characteristics of intended water samples are presented in Tables 1 and 2. Tables 3 and 4 shows the equations and indicators for categorizing the water stability. Calculation of water quality indices is shown in Table 5. Table 6 illustrates the stability indices in water resource. The condition of water stability in the water resources is shown in Table 7.

Description of study area
Divandarreh, one of the cities of Kurdistan province, located at west of Iran (35°54 0 N, 47°01 0 E). The city area is about 4203 km 2 (approximately 15% of Kurdistan province area). The highest and lowest temperatures of air are 32°C and À 20°C, respectively. According to the latest population census in Iran (2016), Divandarreh population was 81,000 persons.

Determine of water characteristics
To assessment of physiochemical parameters of the drinking water in rural area of Divandarreh province, 35 villages selected as sampling points. The samples were collected in rainy and dried seasons in 2015. The collected samples were delivered to laboratory in suitable conditions. After that, the samples were analyzed according to the standard methods for water and wastewater [1][2][3][4][5][6][7]. Measurement of temporary hardness, calcium, magnesium and chloride were carried out using titration method. Concentrations of fluoride, nitrate, and sulfate were determined by DR5000 spectrophotometer [1]. The EC and pH were analyzed with (Jenway 470 Conductivity meter) and pH meter (model Jenway 350), respectively.  Table 1 Analyses of water quality parameters of the study area during dry seasons in 2015.

Sample nos.
Ca þ 2 (mg/l)  Table 2 Analyses of water quality parameters of the study area during rainy seasons in 2015.

Sample No
Ca þ 2 (mg/l)   Table 3 List of indices and water quality in present work.