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Background & Objective: Swimming pools are the most important sports field. The swimming effect on body and mental human health. The health, and disinfection of pools help to protect swimmers otherwise it can transfer agent of disease such as conjunctivitis-dermatit-athletes feet and parasitic in swimmers. The main purpose of this study is to survey the quality of health indicators in swimming pools and matching them with present standard in the Gorgan. Materials & Methods: This is a descriptive and cross-sectional study. It has performed on all of the swimming pool in summer season in Gorgan. In this study, general characteristics had determined by interview method and the parameters such as pH, turbidity, residual chlorine, Coliform bacteria, E.coli, Streptococcus Fecalis and Pseudomonas Aerogenosa determined in the laboratory. The sampling of water was performed every 10 days at 14-16 PM. The residual chlorine and pH determined in the field and the other parameters determined in the laboratory. Results: This research showed that pH>8 in 66.6% of samples and the amount of Coliform, E.coli and Streptococcus Fecalis were not at upper limit of standard, but the Pseudomonas Aerogenosa is more than limit of standard in 58.3% of samples. The residual chlorine was more limit of standard in 61.1% of samples and the amount of residual chlorine was according to limit of standard in Kiani and women’s pools. Conclusion: The lack of chlorinator system-inadequate of water treatment system and lack of knowledge pool’s incumbent cause that pH and residual chlorine were undesirable at most of the time. Additionally bacterial pollution confirms above subjects. So it is recommend that extensive research to be done on relationship between bacterial pollution and prevalence of disease in swimming pools.

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Background and Objective: The use of packaged drinking water is on the rise nowadays in most countries, including Iran. Currently, more than 100 different brands of packaged drinking water are produced and distributed in Iran. This study was done to evaluate the quality of Iranian, foreign packaged drinking waters and municipal drinking water in Golestan Province, north of Iran.
Methods: This descriptive-analytical study was done on 56 packaged drinking waters of different Iranian and foreign brands, eight brands produced in Golestan province and a number of municipal drinking water samples were collected from Gorgan and Gonbad Kavous cities in northern Iran. To assess the quality of packaged drinking water and drinking water, their physicochemical parameters were compared with National Iranian Standards 1053 and WHO. Stiff and Piper diagrams were plotted to determine the type and hydrochemical facies of water samples. Gibbs and Schoeller diagrams were used to determine the water chemistry controlling factors of water samples and their water quality for drinking, respectively.
Results: The concentrations of physicochemical parameters (except bicarbonate) were within the range of national drinking water standards 1053 and WHO. The average nitrate concentration in all packaged drinking and drinking water was within the standard range. The fluoride concentration of all packaged drinking waters and drinking water was within the range of WHO standard. However, only 14 samples of all packaged drinking and drinking water samples are within the range of 1053 National Iranian Water Standard. The total concentration of soluble solids and the total hardness of packaged drinking water were within the range of 1053 NW. There was also a significant difference (P<0.05) between the chemical parameters of magnesium, sodium, chloride and nitrate in packaged drinking water produced in Golestan province with the municipal drinking water samples.
Conclusion: The amount of fluoride in drinking water in this study was less than desirable and required fluorination. The quality of packaged drinking water in Golestan province is better than the municipal drinking water.

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Background and Objective: The increasing development of agricultural and aquaculture activities along the rivers has reduced the quality of running water. The aim of this study was to evaluate Chehel-chai River water quality with national sanitation foundation water quality index (NSFWQI), Iran water quality index for surface water (IRWQISC), Canadian water quality index (CWQI).
Methods: This descriptive-analytical study, was performed on all of 7 sampling stations based on standard factors such as availability, land use type, geology and dispersion along the river, 12 water quality parameters including dissolved oxygen, fecal coliform, pH, biochemical oxygen demand (BOD), chemical oxygen demand (COD), temperature, organic phosphate, nitrate, ammonium, turbidity, total soluble solids and electrical conductivity and 5 cations (sodium, calcium and magnesium) and anion (chloride and sulfate) along the river for summer and autumn seasons 2018 (42 sample) with the standard method was measured.
Results: The amount of phosphate and turbidity increased from station 2 to downstream due to the existence of fish ponds and agricultural drainage. BOD, COD and fecal coliform values at station 6 have increased significantly with due to urban effluent output. River pollution in the summer has increased due to reduction of river flow and after station 3 (promenade) to the downstream, which is due to the entry of agricultural fertilizers and urban wastewater discharge. According to the average of IRWQISC and NSFWQI, the water quality of Chehel-chai River in the sampling station in the area of Minoodasht city (station 6) is in bad class. The CWQI index showed that the water of the Chehel-chai River is suitable for drinking and aquaculture at the border of the class, for agriculture in the bad class, and in terms of recreation and livestock use in the higher class.
Conclusion: The mean values of the above indices indicate high pollution quality class, and since this river is used for water supply for agricultural and aquaculture, management strategies are necessary.