effluvium

the first part of the word is efflu, which means effluents. Effluents as such are harmful and produce a strong noxious smell.

effluvium....efflu(effluent)+vium....effluent means flow out...or vapourize....and in chemistry lab we must have smelt the obnoxious odour of hydrogen sulfide gas............

EFFLUENT is discharged fluid waste. EFFLUVIUM is discharged, unpleasant odor

Because of ef+FLU+vium; area was FOUL SMELLING

relate efflu to swine flu which is noxious to breathe