Air Quality Index Statement
Issued by NWS Knoxville/Tri Cities, TN

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AEUS74 KMRX 191907

Air Quality Index Forecast
National Weather Service Morristown TN
305 PM EDT Thu Apr 19 2018

This forecast is produced by the Tennessee Department Of Environment
And Conservation (

Air Quality Forecast For Friday Apr 20 2018

                                     LEVEL OF

Tri-Cities TN        Green           Good                   OZ

Knoxville TN         Green           Good                   OZ

GSMNP                Green           Good                   PM

Chattanooga TN       Green           Good                   OZ

PM = Particulate Matter

OZ = Ozone

The six levels of health concern:

Good (Green):  Air quality is considered satisfactory, and air
pollution               poses little or no risk.

Moderate (Yellow): Air quality is acceptable, however, for some
pollutants               there may be a moderate health concern for
a very small               number of people. For example, people who
are unusually               sensitive to ozone may experience
respiratory symptoms.

Unhealthy For Sensitive Groups (Orange): Members of sensitive groups
may               experience health effects. This means they are
likely               to be affected at lower levels than the general
               For example, people with lung disease are at greater risk
               from exposure to ozone, while people with either lung
               disease or heart disease are at greater risk from exposure
               to particle pollution. The general public is not likely to
               be affected when the AQI is in this range.

Unhealthy (Red): Members of sensitive groups may experience more
serious                 health effects.

Very Unhealthy (Purple): Everyone may experience more serious health

Hazardous (Maroon): The entire population is more likely to be

For more information, visit the EPA AIRNOW web site at:

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