The study of iron concentration, water hardness and coliform bacteria from water coolers

Abstract

     This study aimed to determine the iron concentration, water hardness and coliform bacteria in drinking water of the water coolers at the factory in Samut Prakan Province and health risk assessment of workers from drinking water of the water coolers. Field survey was randomized 45 samples from 5 water coolers and collected information with questionnaires from 191 workers. Water samples were analyzed in the laboratory for iron concentration using atomic absorption spectrometer. Water hardness was measured using the EDTA titration method and the number of coliform bacteria was determined using the AWWA, 2012. This study showed that the workers who aged 20 to 30 years old including 73.3 percent of the female and 26.7 percent of the male drank water from the coolers 1 to 2 litres a day. The drinking water consumption of the surveyed workers was 71.7 percent. Results indicated that the iron concentration was found in the range 0.06-0.29 mg/litre. Water hardness and coliform bacteria was not detected. These results do not exceed of the standard, which implies that does not risk of health in the workers.