The Collaborative International Dictionary of English v.0.48:

Salubrity \Sa*lu"bri*ty\, n. [L. salubritas: cf. F. salubrit['e]
   See Salubrious.]
   The quality of being salubrious; favorableness to the
   preservation of health; salubriousness; wholesomeness;
   healthfulness; as, the salubrity of the air, of a country, or
   a climate. "A sweet, dry smell of salubrity." --G. W. Cable.
   [1913 Webster]

WordNet (r) 3.0 (2006):

salubrity
    n 1: the quality of being salubrious and invigorating [syn:
         salubrity, salubriousness] [ant: insalubriousness,
         insalubrity]