As spring approaches, it’s important to be aware of a recurring environmental concern: ozone season. Running from March through November, ozone season brings heightened ground-level ozone levels, which can impact air quality and public health. Understanding ozone, its effects, and how to track air quality can help you make informed decisions, especially with spring break just around the corner.
What is Ozone, and Why Does It Matter?
Ozone (O₃) is a gas composed of three oxygen atoms. While ozone in the upper atmosphere is beneficial and protects us from harmful UV rays, ground-level ozone is a different story. It forms when pollutants from vehicles, industrial emissions, and other sources react with sunlight and intense heat.
High levels of ground-level ozone can lead to respiratory issues, eye irritation, and worsen conditions such as asthma. Given North Texas’ warm temperatures and high sun exposure, ozone formation is particularly prevalent during the hotter months. Learn more about ozone here.
Understanding the Air Quality Index (AQI)
To help the public stay informed, the Environmental Protection Agency (EPA) developed the Air Quality Index (AQI), which measures and categorizes air pollution levels. The AQI includes a range of pollutants, but ozone is a key component.
Here’s a quick breakdown of AQI levels and what they mean:
- 0-50 (Good – Green) – Air quality is considered satisfactory, with little to no risk.
- 51-100 (Moderate – Yellow) – Air quality is acceptable; however, some sensitive groups may experience minor effects.
- 101-150 (Unhealthy for Sensitive Groups – Orange) – People with respiratory issues, young children, and the elderly should limit outdoor activities.
- 151-200 (Unhealthy – Red) – The general public may begin to experience health effects, and sensitive groups may feel more severe impacts.
- 201-300 (Very Unhealthy – Purple) – A health alert is issued, meaning everyone may experience more serious health effects.
- 301 and higher (Hazardous) – Emergency conditions; the entire population is at risk.
Sign up for air pollution alerts here.
What Ozone Season Means for Spring Break Plans
With spring break just around the corner, many of us will be spending more time outdoors for road trips, sports, and other recreational activities. Since ozone levels rise as temperatures warm, it’s important to check the AQI before making plans. On high-ozone days, limiting strenuous outdoor activities, especially in the afternoon when ozone levels peak, can help reduce exposure and protect respiratory health.
For those planning to travel within Texas, be aware that ozone levels vary by region due to traffic patterns, industrial activity, and weather conditions. Checking the AQI at your destination can help you prepare and adjust plans as needed.
How to Reduce Your Contribution to Ozone Pollution
While ozone formation is a regional issue, individual actions can make a difference. Here are some ways to help reduce ozone pollution during the season:
- Drive less: Carpool, use public transportation, bike, or walk when possible.
- Limit idling: Turn off your car when parked to reduce unnecessary emissions.
- Use eco-friendly products: Choose low-VOC (volatile organic compound) paints, cleaners, and lawn care products.
- Reduce electricity use: Energy production contributes to air pollution, so conserving energy helps lower emissions.
- More resources on how to take action can be found here.
Stay Informed and Stay Safe
With ozone season in full swing, staying informed about air quality can help protect your health. By making small changes and staying aware, we can work together to keep our skies clear and our lungs healthy this ozone season.