Smog can be harmful to human health and the environment. When it’s smoggy outside, check air quality with EPA AirWatch

PM2.5 and other particles in smog can impact the human heart and lungs. 

Smog can be especially harmful to people who have heart and lung conditions. When it’s smoggy outside, people with these conditions should: 

  • take their prescribed medication 
  • avoid heavy outdoor exercise. 

How you can help reduce the emissions that cause smog

Emissions from vehicles, wood heaters and industry cause autumn and winter smog. To reduce these: 

You can report smoke pollution to us. Contact your local council with concerns about using wood heaters or burning off.  

Find out more about smog 


About smog 

Your health and the environment: learn and take action

Reviewed 16 March 2021