Such a plant would be unlikely to pass significant numbers of pathogens into the water distribution system.
(Such a plant; would be; unlikely to pass significant numbers of pathogens into the water distribution system) (Such a plant; to pass; significant numbers of pathogens; into the water distribution system)
Such a plant Such a plant
would be to pass
unlikely to pass significant numbers of pathogens into the water distribution system
significant numbers of pathogens into the water distribution system