What is Bad Ozone?
Sometimes we hear that ozone is good, as in the ozone layer, and sometimes we hear that ozone is bad as in air pollution
or smog. How can it be both good and bad? This depends on where it is in the environment and how it is formed. This
page will discuss the so called "bad ozone" or "ground level ozone". To learn about "good ozone" by clicking on this link.
In the Earth’s lower atmosphere, near ground level, ozone is formed when pollutants emitted by cars,power plants,
chemical plants, and other sources react chemically in the presence of sunlight. Ozone pollution is a concern during the
summer months when the weather conditions needed to form ground-level ozone—lots of sun, hot temperatures—
normally occur.
Ozone can irritate your respiratory system, causing you to start coughing, feel an irritation in your throat and/or
experience an uncomfortable sensation in your chest. Ozone can reduce lung function and make it more difficult for you
to breathe as deeply and vigorously as you normally would. When this happens, you may notice that breathing starts to
feel uncomfortable. If you are exercising or working outdoors, you may notice that you are taking more rapid and shallow
breaths than normal. Ozone can aggravate asthma. When ozone levels are high, more people with asthma have attacks
that require a doctor’s attention or the use of additional medication. One reason this happens is that ozone makes people
more sensitive to allergens, which are the most common triggers for asthma attacks. Also, asthmatics are more severely
affected by the reduced lung function and irritation that ozone causes in the respiratory system. Ozone can inflame and
damage cells that line your lungs. Within a few days, the damaged cells are replaced and the old cells are shed—much in
the way your skin peels after a sunburn. Ozone may aggravate chronic lung diseases such as emphysema and bronchitis
and reduce the immune system’s ability to fight off bacterial infections in the respiratory system.
This is why ozone water treatment systems are designed to remove ozone before the vent gas is released into the
environment.
Here are some additional links on ground level ozone:
Ozone and Your Health (USEPA)
Smog - Who Does it Hurt? (USEPA)
Summertime Safety: Keeping Kids Safe from Sun and Smog (USEPA)
USEPA Ozone Air Quality Standards
US Ozone Air Quality Trends

Spartan Environmental Technologies
Air and Water Treatment
Spartan Environmental
Technologies, L.L.C.
7383 Lauren J Dr
Mentor, OH 44060
USA
Phone: 800-492-1252
Fax: 440-368-3569
E-mail: info@
spartanwatertreatment.com