Happening NOW: We have Ozone Action Day through Thursday for Houston, Galveston and Brazoria area.
So, what’s the science behind an ozone day?
What is it?
The easiest way to understand it: Ozone is great for blocking UV rays up high, but when it’s down at the surface, it messes with our air, health, and nature. Ozone is a molecule with three oxygen atoms (O3) that shields us from UV rays in the stratosphere. But at ground level, it’s a pollutant—a gas made when sunlight mixes with pollution from cars, factories, and chemicals. It’s a byproduct of human activity, not a natural part of the air we’re meant to breathe. We aren’t supposed to have it piling up down here.
Why it’s bad?
- Breathing Trouble: It’s like invisible smoke. It irritates your lungs, making it harder to breathe—especially if you’re a kid, elderly, or have asthma, putting you in that vulnerable group.
- Hurts Plants: Ozone sneaks into leaves and weakens crops or trees, basically making them sick.
- Wear & Tear: It slowly breaks down stuff like rubber or paint over time.
You can track air quality near you here: