In situ treatment of PCBs by anaerobic microbial dechlorination in aquatic sediment: are we there yet?

► Microbial catalysts with different PCB dechlorinating activities are cultured. ► Biostimulation and bioaugmentation has been successful in the laboratory. ► Molecular tools for monitoring dechlorinating bacteria in situ are available. ► Methods to deploy these catalysts in the field are currently under development.