A Study of Production Process and Quality of Water Supply in Nongtum Subdistrict Municipality, Mueang District, Khon Kaen Province

Abstract

The objectives of this research are to study the production process and quality of water supply in Nongtum Subdistrict Municipality, Moo 1, Moo 3 Moo 6  and Moo 11. The assessment of the water supply production process is conducted through site observation and interviewing with system administrators. Raw water quality was assessed based on three characteristics, physical, chemical and biological. The quality of water supply in each process of production including process of adding chemical and chlorine to disinfect germs and bacteria were examined. 21 parameters including Turbidity, Apparent color, pH, Total dissolved solids, Hardness, Sulfate, Chloride, Nitrate, Nitrite, Fluoride, Iron, Manganese, Copper, Zinc, Lead, Total chromium, Cadmium, Arsenic, Mercury, Total coliforms bacteria, Escherichia coli and residual chlorine were investigated conformed with the drinking water quality standard criteria, Department of Health, 2021. According to the result, the assessment of 21 water supply quality parameter, for Surface water supply of Moo 1 and Moo 3,4 are acceptable. The residual chlorine content in water supply of is  equal to 1.0 mg per liter which is match the recommendations of the World Health Organization. The quality of groundwater water supply in Moo 6 have total dissolved solids, hardness, chloride, manganese, coliforms bacteria, Escherichia coli and the quality of surface water supply in Moo 11 was a color and coliform value exceeding the standard. The residual chlorine content in water supply of both station is less than 0. 2 mg per liter which is below the standard criteria of drinking water.  It was found that quality of water supply production process in  Moo 1 was rated as excellent with average score of 90 percent in Moo 3 and Moo 11 were rated as good with average score of 86 and 82 percent and in Moo 6 was rated as fair with average score of 64 percent.