effluvial

/ɪˈfluviəl/
adjective
  1. Relating to or resembling an unpleasant or harmful vapor, odor, or exhalation (effluvium).
    • Workers wore masks to protect themselves from the effluvial gases in the sewer.
    • The effluvial smell from the swamp was almost unbearable.
    • The old landfill gave off an effluvial stench that could be smelled miles away.