1) Healthfulness 2) Healthiness 3) Salubriousness 1) Salubriousness 
• (n.) 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.
Sa·lu'bri·ty noun [ Latin salubritas : confer French salubrité 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, ...
[n] - the quality of being salubrious and invigorating
salubrity 1. The quality of being salubrious and invigorating. 2. Wholesomeness; healthfulness; favorableness to the preservation of health; such as, the salubrity of a country or climate.
salubriousness noun the quality of being salubrious and invigorating