title: Wastewater treatment plant. Informal  settlement. Urban activities
design: Microbial diversity was determined using the 16S rRNA gene (V3-V4) region (460 bp) analysis with locus-specific primers 341F (5-CCTACGGGNGGCWGCAG-3) and 805R (5- GACTACHVGGGTATCTAATCC-3). Illumina forward and reverse overhang adapters were attached to the 5`-end of forward and reverse primers respectively