THE DISTRIBUTION OF LEACHATE POLLUTANTS FROM THE JABON LANDFILL, SIDOARJO REGENCY

The presence of Jabon landfill leachate poses a significant threat to the surrounding populace due to groundwater contamination, necessitating a thorough understanding of its extent and implications for public health. This research aims to comprehensively analyze groundwater samples collected from various distances around the Jabon landfill site. Utilizing advanced spatial modeling techniques and a meticulous examination of key parameters, our study seeks to elucidate the spatial distribution and spread of leachate, facilitating an assessment of its impact on groundwater quality. Groundwater samples were collected from 12 wells at varying distances from the landfill. Analysis revealed contaminant concentrations decreasing with distance, with parameters like pH, Electricity Conductivity (EC), Dissolved oxygen (DO), Chemical Oxygen Demand (COD), Total Dissolved Solid (TDS), and Cadmium (Cd) showing variations correlating with proximity to the landfill. The Pollution Index obtained the highest value of 6.1 in wells 6 and 12, located at 1,497.15 meters and 2,491.42 meters from Jabon landfill. Well 8, located 3,691 meters from Jabon landfill, has a Pollution Index of 5.8. Spatial analysis indicated waste dispersion from west to east and north to south, mirroring decreasing groundwater elevation levels. Overall, well pollution status suggested moderate contamination. These findings provide valuable insights into leachate pollution dynamics, emphasizing the need for proactive measures to mitigate its adverse effects on the environment and public health. By shedding light on these dynamics, this study contributes to ongoing efforts in environmental sustainability and informs the development of effective pollution management strategies tailored to landfill leachate contamination challenges.