Relative abundance of potential bacteria carrying integron genes in wastewater network compartments. The right side of the table shows the bacterial families which host integron genes (dark blue). The numbers show the relative abundance of the potential bacteria hosting integrons in each compartment. RU, upstream river water column; SRU, upstream river sediments; HP, hospital wastewater (HP_A and HP_B); CM, community wastewater; INF, WWTP influent; RAS, recycled activated sludge; EFF, WWTP effluent; RD, downstream river water column; and SRD, downstream river sediment.