Standard oxygen concentration for earth's atmosphere is 20.9%
Theoretically, this percentage does not change at varying altitudes. What changes is the density of the oxygen (and other gases, such as nitrogen) present in the air. At sea level or on a mountain top, oxygen concentration is 20.9%
However, depending on things like air pollution and location (indoors vs. outdoors), O2 concentration can vary widely, down to as little as 10% in polluted indoor environments.
If you mean what Arizona's highest point is, the answer is the Humphrey's Peak and is 12,637 feet (3,852 meters) above sea level
Mount Everest is approximately 29,032 feet (8,848 meters) above sea level.
Pasadena, California has an average elevation of about 864 feet above sea level.
8,000 feet into the atmosphere
Santa Fe's altitude is around 7,000 feet above sea level.
The 'Queen of the Hills' is 7000 feet above sea level
Most of the Rocky Mountains are 7,000 above sea level.(:
Colorado
The elevation of the city ranges from4,900 feet (1,490 m) above sea level near the Rio Grande (in the Valley) to over 6,700 feet (1,950 m) in the foothill areas of Sandia Heights and Glenwood Hills. At the airport, the elevation is 5,352 feet (1,631 m) above sea level.
It is 781 feet above sea level.
Cincinnati is 482 feet (147 meters) above sea level
Baltimore is 33 feet above sea level.
Sierra Madre Occidental average height is 2745 meters (9000 feet) above sea level.Sierra Madre Oriental average height is 2135 meters (7000 feet) above sea level.
It is 3,600 feet above sea level in Calgary
Tucson's elevation is listed as 2389 feet.
Sarasota Florida is located approximately 15 feet above sea level. Here is a list of the heights of some of the most prominent places in Sarasota: Lido Beach - 12 feet above sea level Sarasota Bayfront - 28 feet above sea level Sarasota-Bradenton International Airport - 28 feet above sea level Siesta Key - 32 feet above sea levelThese heights are all relative to the sea level at the City of Sarasota.
It is 2.389 feet above sea level.