Action Day Alert for Multiple Pollutants in effect until at least 4PM tomorrow

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Regional Air Quality Council

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Aug 3, 2026, 4:58:07 PM (17 hours ago) Aug 3
to kste...@larimer.org
Plan ahead and protect your health!

Action Day Alert

in effect from 4PM today until at least 4PM tomorrow

for Multiple Pollutants

Ground-level ozone may reach levels unhealthy for sensitive tomorrow, August 4th, 2026

In addition, increasing wildfire smoke across the Front Range will result in elevated levels of fine particle pollution that will be unhealthy for sensitive groups, today, August 3rd and through tomorrow, August 4th.


Para obtener información sobre esta alerta en español

Protect your health


Concerned about the impacts of ozone pollution and wildfire smoke on your health? On days with a "multiple pollutants" alert, all Front Range residents should reduce prolonged or heavy exertion, such as lengthy or intense exercise. This is especially important for people with heart or lung disease, older adults, and children. 


Learn more about what to do when smoke and ozone overlap.


Want to get outside? Check the AQI first.


When indoors, run an air purifier with a HEPA and carbon filter to reduce particle pollution from smoke in your home, office, or school.


Breathe easier: High-quality, well-fitting masks — such as KN95s and N95s — can filter out particle pollution from wildfire smoke both indoors and outside. (Masks do not filter out ground-level ozone.)

Learn more about steps to protect your health from ozone

Take simple steps for better air!

We can all have a positive impact on Colorado Front Range air quality, by reducing the emissions that lead to the creation of ground-level ozone pollution on hot, sunny, summer days.

Hybrid work schedule? Work from home tomorrow to skip your commute.

Be strategic: Plan your outdoor activity days according to air quality forecasts. Swap the bike ride or run for a session in the gym, pool, indoor climbing gym, or a yoga class.

Learn more about steps to reduce your emissions
Learn more at SimpleStepsBetterAir.org
Encourage others to sign up for text or email alerts
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The Regional Air Quality Council and Colorado Department of Public Health and Environment (CDPHE) have issued this notification. colorado.gov/airquality/advisory


Para obtener información sobre esta alerta en español, haga clic aquí.



Learn how ozone pollution affects your health here.

For more information on air quality programming go to raqc.org.

For more information on other air quality programs go to raqc.org/programs.

Learn about better ways to commute at waytogo.org.

Regional Air Quality Council | 1445 Market Street, Ste. 260 | Denver, CO 80202 US

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