Microbial quality and emerging pollutants in freshwater systems of Mega Manila, Philippines: a scoping review

ABSTRACT Microbial and chemical qualities of drinking water and freshwater bodies in highly urbanized regions of developing countries remain as global knowledge gaps. This current scoping review addressed this issue in the case of Mega Manila, Philippines. Quantitative and qualitative analyses of literature were done to support syntheses and identify gaps in water quality monitoring and management. The microbial quality of freshwater bodies and drinking water within the region is indicated by the detected microbial communities, bacterial species, and genetic elements associated with drug resistance, through culture-dependent and -independent approaches. Heavy metals were found to contaminate freshwater bodies but were absent in the drinking water supply. Overall, our findings highlight the need for harmonizing monitoring tools and data to assess water safety. Outside Mega Manila, freshwater bodies and drinking water supply must be monitored. Research focusing on environmental and public health as impacted by drinking water and resources must also be prioritized.