what is happening with Ozone in places like Austin and Around the world?

begin quote from: AI Overview

To understand what is happening with ozone, it is important to separate it into two entirely different atmospheric phenomena: bad ozone at ground level (smog), which is actively worsening due to heatwaves, and good ozone in the stratosphere (the ozone layer), which is slowly healing but facing new climate challenges.

Here is the current snapshot of how these two forces are playing out locally in Austin and globally.

---

☀️ The Local Story: Ground-Level "Bad" Ozone in Austin

In Austin and across Central Texas, ground-level ozone is an ongoing public health challenge aggravated by intense heat. Ground-level ozone isn't emitted directly; it is cooked up when traffic fumes and industrial emissions react with intense Texas sunlight and high temperatures. 

Ozone Action Days: The Texas Commission on Environmental Quality (TCEQ) frequently declares Ozone Action Days for Travis, Williamson, and surrounding counties. On these days, the air quality index (AQI) often breaches into the "Unhealthy for Sensitive Groups" territory. 
The "F" Rating: Because of its persistent, car-heavy commuter culture and extreme summer heat, Travis County has maintained an "F" rating for ozone pollution from the American Lung Association. 
External Factors: Austin's air quality is increasingly complicated by external factors like drifting wildfire smoke from California and Idaho, which acts as a "precursor" that makes local ozone form even faster. 

---

🌍 The Global Story: Smog vs. The Stratospheric Ozone Shield

Globally, scientists are tracking two vastly different trends depending on how high up you look.

1. Ground-Level Ozone Pollution is Spreading

A recent global report from the Copernicus Atmosphere Monitoring Service (CAMS) revealed that nearly 40% of the world's population has been exposed to dangerous ground-level ozone. 

Due to massive heatwaves and widespread global wildfires, only about 5% of the world's population is breathing ozone levels considered "Good" by the WHO.
Asia is currently the hardest-hit region, followed closely by Europe and North America. 

2. The Stratospheric Ozone Layer is Still Healing (But Facing Fluctuations)

The good news is that the protective ozone layer high up in the atmosphere—which shields us from harmful UV rays—continues its long-term trajectory toward a full recovery thanks to the 1987 Montreal Protocol. However, its recovery from year to year is highly variable: 

The Size Fluctuates: The Antarctic ozone hole fluctuates significantly based on weather patterns. While 2025 saw one of the smallest and shortest-lived ozone holes in decades, atmospheric shifts caused the seasonal hole to expand. Atmospheric scientists emphasize that these year-to-year swings are normal natural variations, and the overall downward trend of ozone-destroying chemicals remains intact. 
New Threats: Despite the overarching success, scientists from the Massachusetts Institute of Technology (MIT) recently identified hidden loopholes, such as industrial chemical feedstock leaks, which could delay full recovery by up to seven years if left unaddressed. 
The Timeline: If current environmental treaties are maintained, the global ozone layer is projected to return to healthy 1980 levels by 2040 for most of the world, 2045 over the Arctic, and 2066 over the Antarctic. 

---

Summary: Ozone At a Glance

Type of Ozone	Location	Current Trend	Core Driver
Ground-Level Ozone (Smog)	Austin & Global Cities	Worsening 🔴	Traffic/industry emissions baked by extreme heat and wildfire smoke.
Stratospheric Ozone (The Layer)	15–30 km above Earth	Healing 🟢 (Long-term)	Global phase-out of CFCs and other banned ozone-depleting chemicals.

If you live in the Austin area, you can proactively track local daily ozone risks and air quality alerts via AirNow.gov to ensure you are exercising safely outdoors. 

Would you like to learn more about how to protect your health during local Ozone Action Days, or are you more interested in the global treaties used to mend the stratospheric ozone layer?

• 

  World Meteorological Organization WMO

  Small and short-lived 2025 ozone hole confirms long

  Small and short-lived 2025 ozone hole confirms long-term recovery trend * During the height of this year's ozone depletion season ...

  
• 

  Geographical

  Almost 40 per cent of the world's population exposed to ...

  Almost 40 per cent of the world's population exposed to harmful ozone pollution in 2026 - Geographical Almost 40 per cent of the w...

  
• 

  Terrapass

  Is Ozone Depletion Still a Concern? 2026 Update

  Jan 14, 2026 — Ozone depletion is not a major driver of climate change, but the two issues share many of the same root causes and solutions. * Th...

  

Show all

Nearly 40% of global population exposed to dangerous ...

ABC News - Breaking News, Latest News and Videos

https://abcnews.com › story

Sep 29, 2026 — Nearly 40% of global population exposed to dangerous ozone pollution in 2026: Report Ground-level ozone harms human health, ecosystems and crop ...

People also ask