Human Health Risk Assessment Through Treated Effluent Use in Public Park Irrigation

Abstract

The potential public health risk associated with treated effluent reuse for irrigation in public parks/lawns has been investigated in this study. The concentration of some pathogenic microorganisms in treated effluent used in park irrigation has been determined. The average concentration were found to be lie 105 to 107 MPN/100ml for total coliform, 105 to 107 MPN/100ml for fecal coliform, 104 to 105MPN/100ml for Shigella and 00 to 102 MPN/100ml for Salmonella and hazard concentration was found to be 1000MPN/100ml for total and fecal coliform for people exposure of the treated effluent used in park irrigation. The concentration of bacterial pathogens, namely Shigalla, Salmonella and coliforms (bacterial pathogen indicator) in treated effluent indicate that there is potential health risk within the study area. In general, exposure of these microorganisms through inhalation and ingestion through Sprinkler resulted in less hazard concentration compared to that through ingestion of drinking water. This study also focused on issues, such as considerations for sensitive population and concentration of microorganisms in treated effluent for assessing risks associated with exposure of microorganisms in treated effluent use in public parks irrigation. III