Abstract

Gas that highly produced from decomposition of garbages at fi nal spot waste disposal is methane.Methane gas is one of gases that can cause poisoning and source of air pollutants which cause health problems such as respiratory disorders. The study aimed to determine the relationship between distance and physical qualities of houses with levels of methane gas inside houses surrounding the fi nal spot waste disposal, the TPAS in Batu Layang Village, North Pontianak year 2015., It was an observational study with a cross sectional design. Samples were all, 34 houses around the TPAS in Batu Layang Village. The analysis was by chi-square test. Most inhabitants were educated 60% of elementary and junior high school and 68% labors. More than half, 19 (55.9%) had at the average methane gas levels in houses with high category of 0.25 ppm. The majorities 84.2% distance of houses to the TPAS and house conditions with types of 81.3 % fl oor, 83.3% wall and 66.7% large ventilation were not as the requirements. The types of fl oor and wall that were not as the requirements and distance of houses to the TPAS were risk to methane gas in the house as 8.66 (95%CI 1.76–42.60), 7.22 (95% CI:1.26–41.14), and 4,66 (95% CI 0.94–23.03) times higher than house conditions as the requirements and near distance to the TPAS. Near distance of houses to the TPAS and types of fl oor, wall not as requirements caused methane gas into the houses. Meanwhile large house ventilation was not associated with methane levels in the houses likely because the distance and types of fl oor, wall had more infl uences Inhabitants who live surroundings the TPAS should cover fl oors with rugs and make wall of house from woods with well arranged. Moreover, they should plant shade trees to absorb and reduce gases to gases from the TPAS, especially methane.