Air Quality

How high is considered to be high altitude?

A Answers (1)

  • High altitude is defined as 5,000 to 11,500 feet (1,524 and 3,505.2 m) above sea level. An altitude between 11,500 and 18,000 feet (5,486.4 m) above sea level is considered to be very high altitude. Anything above 18,000 feet above sea level is considered to be an extreme altitude.

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