We’re talking about tropospheric ozone—the stuff created when car exhaust and industrial fumes cook in the hot sun. Think of it as a chemical soup left out in the summer heat.
So, how much of this ground-level ozone is safe? The short answer: very, very little. The U.S. Environmental Protection Agency (EPA) sets the safe limit at 0.070 parts per million (ppm) over an 8-hour period.
That number is so tiny it’s like finding one specific grain of sand on a beach. Go over that, and your lungs start sending you angry text messages.
What Happens When You Breathe Too Much?
First, your throat might feel scratchy. Then your chest gets tight, like you just tried to run a marathon after eating a whole pizza. Fun, right?
Ozone is basically a chemical Pac-Man that munches on the lining of your lungs. It inflames your airways, triggers coughing, and makes asthma go from “manageable” to “call an ambulance.”
Even if you’re a gym rat, too much ozone can mess with your workout. It reduces lung function, meaning you’ll be huffing and puffing after one flight of stairs. Not a great look.
