Indian Journal of Public Health Research & Development

This study aims to determine total coliform present in water and to determine the health risk to the people who consume water contaminated by bacteria. The research was a cross observational study with microbe risk analysis conducted in Puty Village of Bua District, Luwu Regency. The sample consisted of 15 drilling wells and 34 respondents who owned drilling wells selected using purposive sampling method. The data was analyzed using MRA method and Excel programs. The results of the research indicate that the average concentration of total coliform in drilling water among 15 samples is 130–160.000000 MPN/100 ml water. Meanwhile, for E. coli the average concentration in water exceeds the standard of drinking water quality, i.e 23–24000.000 cells/100 ml while the standard drinking water quality should be 0/100 ml water. The amount of risk for public who consume water contaminated by bacteria is in a high risk on average. The results of risk analysis indicate that the highest Probability of infection (P_inf/day) of Escherichia coli bacteria contamination in water among 15 samples is sample 5, i.e 2.40E⁻⁰⁴. Probability of infection/year (P_inf/year is 874E⁻², while probability of illness (P_ill) is 1.28E⁺²). Therefore, this is in a high risk category which means that it is risky of a disease.