Ozone Action Days


What's wrong with the air?

We hear a lot about depletion of the ozone layer in the stratosphere. This kind of ozone protects us from harmful ultraviolet radiation. Stratospheric ozone is good, but ground-level ozone is harmful.

When people think about ground-level ozone, they usually picture a thick layer of smog over Los Angeles. They don't usually think of a midwest summer day-hazy blue sky, sunny, and hot.

Although ozone cannot be seen or tasted, it can irritate lungs and make breathing difficult. The urban haze that we call smog contains pollutants that react to form ozone. Most of the pollutants that form ozone come from cars. Large factories account for another portion of the emissions. Small Businesses such as printing plants, service stations, and auto body shops, and people using lawnmowers, paints and cleaning solvents account for another portion of the emissions.

Ozone Health Facts

* There is an association between ozone levels in the outdoor air and increased hospital admissions for respiratory causes, such as asthma.

* Ozone air pollution has been associated with as much as 10% to 20% of all summertime respiratory hospital visits and admissions.

* Children with respiratory problems are at greatest risk because of greater exposure to outdoors during the summer months.

What can I do to protect myself and my children from ozone pollution?

On days when your State or local air pollution control agency calls an Ozone Action Day:
* Do your share for cleaner air.

* Asthmatics and other sensitive individuals should not exercise and should stay indoors in an air conditioned or well ventilated area.

* If you experience symptoms such as tightness in the chest, coughing, or wheezing, see your doctor immediately.
* Information taken from the Ozone Action Days brochure produced by the U.S. EPA
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Last updated 3/16/99.