Good ozone vs. bad ozone
Ozone is good when it is high up in the atmosphere. It protects us from ultraviolet (UV) rays that can be damaging to our skin and other living organisms. Ozone is bad when it is close to the ground where we breathe.
What causes ozone pollution?
Ground-level ozone (smog) is formed through a complex chemical reaction involving hydrocarbons, nitrogen oxides and the sunlight. The hydrocarbons and nitrogen oxide emissions from cars and industry are heated up by sunlight to form ground-level ozone. People often assume industry is the main source of air pollution, while approximately half of the hydrocarbons in ozone smog come from the everyday actions of ordinary citizens as we drive our cars, maintain our homes and use a variety of products containing volatile chemicals. High levels of ground-level ozone typically occur on hot, summer days, but can occasionally occur outside of the summer season.
How does ozone affect our health?
Ozone can cause shortness of breath, coughing, wheezing, eye and nose irritation. It can be especially dangerous to the elderly, children, people with chronic respiratory ailments (especially asthma) and even individuals who exercise outdoors.
How can we protect ourselves and our families from ozone?
Know your local air quality! Get free air quality forecastes sent directly to your inbox. You can also find the daily air quality forecast on our homepage, and often by watching your local weather forecast. When the air quality reaches the Orange—“Unhealthy for Sensitive Groups” (or higher) category, follow the recommended actions listed on the Air Quality Index to protect your health. You should also follow any physician prescribed regimen. Especially sensitive individuals should follow such actions when the air quality is Yellow – “Moderate” (or higher). In addition to protecting our health, we can also Take Action and reduce air pollution.
Air Quality Forecasts
Air Pollution Action Days
Air Quality Index
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