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Environmental Epidemiology Program

Utah Air and Your Health

Air Quality Index (AQI)-based guidance for public health

How To Use This Page
1. Use the drop-down list under "Current Conditions" to select your location. If your location is not listed, click here.
2. Find the current PM2.5 and/or ozone levels.
3. Each row in the "General AQI Information" table applies to a specific range of values for PM2.5 or ozone. Find the row where the range includes the current conditions value. If the PM2.5 and ozone values do not fall on the same row, use the value resulting in a higher AQI Index Value.
4. "Cautionary Statements" are broad recommendations to protect health based on AQI conditions. More detailed information can be obtained by looking at the rows of the same color in the "AQI Info" and “Symptoms” tables (click on the table icons to open).

 

General AQI Information

AQI
Range
PM2.5
Range (µg/m3)
Ozone
Range
(ppm)
Health Category Cautionary Statements
0 - 50
0.0 - 12
0.0 - 0.059
Good
None
51 - 100
12.1 - 35.4
0.060 - 0.075
Moderate
Unusually sensitive people should consider limiting prolonged outdoor exertion.
101 - 150
35.5 - 55.4
0.076 - 0.095
Unhealthy for Sensitive Groups
Active children and adults, and people with respiratory diseases such as asthma, should limit prolonged outdoor exertion.
151 - 200
55.5 - 150.4
0.096 - 0.115
Unhealthy
Active children and adults, and people with respiratory diseases such as asthma, should avoid prolonged outdoor exertion. Everyone else, especially children, should limit prolonged outdoor exertion.
201 - 300
150.5 - 250.4
0.116 - 0.374
Very Unhealthy
Active children and adults, and people with respiratory diseases such as asthma, should avoid all outdoor exertion. Everyone else, especially children, should limit outdoor exertion.
301 - 500
Over 250.4
Over 0.374
Hazardous
Everyone should avoid all outdoor exertion.

 

For further details on air quality and your health, please click
on table icons below and match PM2.5 and OZONE levels

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The AQI addresses the health effects resulting from exposure to ozone or particulate matter (PM) individually. Typically, when one of these air pollutants is high (for example, summertime ozone), the other (summertime PM) is low. There are occasions when both may be high (for example, high summertime ozone and concurrent high PM caused by wildfires). During these kinds of conditions, the likelihood of experiencing symptoms may be higher than indicated by these charts.

The AQI was developed using available scientific knowledge on average adverse health effects after acute exposure among a population. Individuals may be more or less sensitive. Base your interpretation of the current air quality conditions on your personal experience and history of symptoms under past similar air quality conditions.

 

Learn more about air pollution sources and trends in Utah...

Carbon Monoxide (CO) Lead Nitrogen Dioxide (NO2) Ozone (O3) Particulate Matter (PM) Sulfur Dioxide (SO2)

...and how it can affect your health

Adverse Birth Outcomes Asthma Chronic Obstructive Pulmonary Disease (COPD) Heart Disease Heart Attacks

 

Track your symptoms during the ozone season

Find answers about pregnancy and air quality

 

Click Below For More Information

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Updated September 24, 2014