Field Investigation of Groundwater Contamination from Solid Waste Landfill in Malang, Indonesia

Abstract- Groundwater is an important source of irrigation and drinking water, especially for rural population in small city. Groundwater can be contaminated by a wide range of sources, include the septic tanks, underground storage tanks, improperly disposed of industrial wastes, mining waste, fertilizer and pesticides. One particularly common source of groundwater contamination is a poorly designed or maintained landfill from which liquid waste or leachate, are leaking into shallow groundwater. This paper investigates the effect of landfill site selection on the contamination of shallow groundwater, surface water and water well around landfill site. According to the site investigation and laboratory test based on water samples collected, BOD5, COD, pH, NO3 and EC indications are 10.8 mg/l, 32 mg/l, 7.5, 0.09 mg/l and 461 µhos/cm, respectively and were higher than standard regulation of water quality. Results from the investigation showed that groundwater, surface water and urban water-well around landfill area had been contaminated by leaching from solid waste landfill. Therefore, improvement and increment of quality control of design and operational management landfill are needed