Air quality health advisory levels

Recommended Action/Activity1
Color Code
& Air Quality Condition
Air Quality Description Sensitive Groups2People Experiencing Health Effects2 Everyone Else
 
Green (Good) Considered satisfactory & poses little or no risk Highly sensitive individuals may be affected at these levels   Potential health effects not expected
 
Yellow (Moderate) Acceptable, however, may be moderate health concern for small number of people Be aware that levels are slightly elevated If you experience breathing difficulties, such as chest tightness or wheezing, stop activities, use a rescue inhaler and find a place to sit down and rest. Potential health effects not expected, however actions to reduce exposure to vog may be useful
 
Orange (Unhelathy for Sensitive Groups) Members in sensitive groups, including healthy individuals with mild asthma, may experience health effects. They may be affected at lower levels than general public. Toward the upper end of this range, most asthmatics who are active outdoors are likely to experience some breathing difficulties. General public not expected to be affected in this range. Avoid outdoor activities that cause heavy breathing or breathing through the mouth3 If you experience breathing difficulties, such as chest tightness or wheezing, stop activities, use a rescue inhaler and find a place to sit down and rest. Potential health effects not
expected, however actions to
reduce exposure to vog may
be useful
 
Red (Unhealthy) Everyone may begin to experience health effects. Members of sensitive groups may experience more serious health effects. Avoid outdoor activities & remain indoors Consider leaving the area Avoid outdoor activities that cause heavy breathing or breathing through the mouth4
 
Purple
(Very Unhealthy)
Triggers health alert, meaning everyone may experience more serious health effects. Avoid outdoor activities & remain indoors Leave the area & seek medical help Avoid outdoor activities & remain indoors
 
Maroon (Hazardous) Triggers health warnings of emergency conditions. Entire population is more likely to be affected. Avoid outdoor activities & remain indoors. Leave the area if directed by Civil Defense Leave the area &
seek medical help
Avoid outdoor activities & remain indoors. Leave the area if directed by Civil Defense
  • Asthmatics & persons with chronic respiratory disease: ALWAYS have your medications available. Reducing your exertion level so that you can breathe through your nose will reduce the amount of sulfur dioxide and particulate matter that reaches your lungs.
  • People experiencing health effects: Contact your doctor as soon as possible if any problems develop, as respiratory conditions might worsen rapidly in heavy sulfur dioxide, particulate matter, or vog conditions.
  • People have different sensitivities to sulfur dioxide and/or particulate matter. Use this table to learn how sensitive you are, so that you can develop appropriate measures to protect your health and avoid serious responses.
  1. Susceptible individuals may develop symptoms at or below the Warning limits
  2. Sensitive Groups = children and individuals with pre-existing respiratory conditions such as asthma, bronchitis, emphysema, lung or heart disease. Note: Some people with mild asthma may not be aware of it. If you have breathing difficulties at low levels of sulfur dioxide or particulate matter, check with your healthcare provider.
  3. People react differently to sulfur dioxide and particulate mater – some are more sensitive. The nasal passages can remove a lot of sulfur dioxide before it gets to the lungs. For many people simply reducing activity levels enough so that they can breathe through the nose will permit them to be outdoors without symptoms.