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Groundwater  is  the  main  water  resource increased demand for water while the availability of groundwater has decreased both in quality and qua activities also produce industrial, agriculture and munic purposes  of  this  study  are  to  determine  the  quality  of  groundwater  around  tofu  industrial  factory  and  its  evaluation  for drinking water based on Health Minister Regulation N temperature,  pH,  total  dissolved  solids  (TDS)  and  electrical  conductivity  (EC)  were  measured  by  using  YSI Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD) were measured based on SNI SNI 06­698.72.2009 test method, respectively 396 μS/cm. Almost all groundwater were acidic Groundwater  had  COD  average  78  mg/L, indicated  that  groundwater may  have  been  contaminated  by  organic material  from  tofu  industrial  wastewater.  Therefore, groundwater should not be used as a source of drinking

Assessment of Groundwater Quality for Drinking Purpose in an Industrial Area, Dumai City, Riau, Indonesia.