SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/epa-ozone-layer-location

In which layer of the atmosphere is most ozone found?

The stratosphere, roughly 9 to 18 miles above the ground.

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  1. The troposphere, right at ground level
  2. The stratosphere, about 15 to 30 km up ✔
  3. The mesosphere, near the edge of space

Why: Most of the atmosphere's ozone sits in a layer in the stratosphere. That is why it is called the ozone layer. It soaks up much of the sun's harmful ultraviolet light before it reaches us.

Huh, didn't know that: Commercial airlines fly in the lower stratosphere.

The dad joke
The ozone layer is a sunscreen for the whole planet, and nobody forgets to reapply it.
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References

Answer: The stratosphere, about 15 to 30 km up. Most of the atmosphere's ozone sits in a layer in the stratosphere. That is why it is called the ozone layer. It soaks up much of the sun's harmful ultraviolet light before it reaches us.

  1. Basic Ozone Layer Science, US EPA www.epa.gov/ozone-layer-protection/basic-ozone-layer-science
    Most atmospheric ozone is concentrated in a layer in the stratosphere, about 9 to 18 miles (15 to 30 km) above the Earth's surface
    Checked 2026-10-10.

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