Bacteriological quality and environment risk of water pollution of dug wells on Semau Island, Indonesia

Abstract

Dug wells are a source of clean water used by many people in Indonesia. Poor quality water can have negative effect on public health. This study was to obtain an overview of the bacteriological quality of water and the risk of water pollution of dug wells on Semau Island, Indonesia. The research design was a cross-sectional study. The research location was on Semau Island (8 villages), one dug well was taken for each village as a sample. Observations and laboratory examinations were conducted to determine environment risk factors, total coliform, Escherichia coli and total bacterial. The results showed that the total coliform in 6 samples exceeded standards, E. coli were found in all samples, the total plate number ranged 85-190 CFU/ml. The dug wells environment showed that 50% are at a distance of <10m from the source of pollution, 100% no waste water drainage, 62% there were cracks on the floor, 62% of the well 3 meters deep no plastered, 82% no fence. Some samples had poor bacteriological quality and environment risk factors for contamination, it is necessary to improve the facilities and environmental of the wells and treat water before consumption.