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Community Indicators Home > Regionalism > Regionalism Ind 3: Good air quality days

 

Indicator 3:

Good air quality days

Trend
vs. Georgia







What does it measure?

This indicator measures the percent of days on which the daily maximum hourly Air Quality Index (AQI) was in the “Good” range.  The measured pollutant concentration in the air is converted to a number from 0 to 500.  A “Good” air quality index rating is defined as less than 50 on this scale.  AQI from 51 to 100 means that there is a moderate level of air pollution but it will be safe for most people.  When AQI is from 101 to 150, the air is unhealthy for sensitive groups such as older adults, younger children and those with respiratory sensitivity.  The air is unhealthy when AQI is from 151 to 200, and very unhealthy from 201 to 300.  When AQI is over 300, the air is hazardous and the entire population is likely to be affected.

 

Why is it important?

Good air quality improves the quality of life of the people living in a community. The Air Quality Index is a nationally standardized measure of daily air quality conditions in relation to its effects on health. The pollutants measured daily are ground level of ozone, particulate matter, carbon monoxide, sulfur dioxide and nitrogen dioxide. An unhealthy level of these air pollutants caused by an increasing amount of motor fuels or factory exhaust generates health problems and harms the environment. It especially endangers the health of sensitive groups such as asthmatics, children, or elderly people. Therefore it is essential for a community to regularly monitor the level of air pollution and develop policies to meet or exceed federal standards for air quality.
 

How are we doing?

In 2012 the percent of “Good” air quality days in Savannah decreased to 62.3% from 64.1% (2011). Although there was a decrease in the percentage of “Good” days, Savannah’s air quality continues to be better than that of Georgia’s urban areas.  The seven metropolitan areas are Athens, Atlanta, Augusta, Columbus, Macon, North Georgia, and Savannah.  Across Georgia, the percent of “Good” days decreased from 51.2% (2011) to 48.9% (2012).  There was a decrease in percent of days under Moderate, Worse than Moderate, and Unhealthy for Sensitive Groups in Georgia’s urban areas from 2011 to 2012. For both Savannah and Georgia, about 19% of the data were not available.      
 
 
 AIR QUALITY INDEX IN SAVANNAH
Source: Georgia Department of Natural Resources

 
SAVANNAH Good Moderate Worse than Moderate Unhealthy for sensitive groups Unhealthy Very
Unhealthy
Not
Available
2000 87.4% 12.3% 0.3% 0.3% 0.0% 0.0% 0.0%
2001 91.5% 7.1% 0.0% 0.0% 0.0% 0.0% 1.4%
2002 92.9% 5.8% 0.0% 0.0% 0.0% 0.0% 1.4%
2003 84.9% 14.8% 0.0% 0.0% 0.0% 0.0% 0.3%
2004 64.5% 33.9% 1.4% 1.4% 0.0% 0.0% 0.3%
2005 48.5% 46.8% 1.6% 1.4% 0.0% 0.3% 3.0%
2006 44.1% 54.8% 1.1% 0.5% 0.0% 0.5% 0.0%
2007 54.0% 40.8% 3.0% 2.5% 0.5% 0.0% 2.2%
2008 66.4% 33.3% 0.3% 0.3% 0.0% 0.0% 0.0%
2009 79.7% 17.8% 0.0% 0.0% 0.0% 0.0% 2.5%
2010 74.5% 23.0% 0.0% 0.0% 0.0% 0.0% 2.5%
2011 64.1% 29.6% 2.7% 2.5% 0.3% 0.0% 3.6%
2012 62.3% 18.3% 0.0% 0.0% 0.0% 0.0% 19.4%

Note: “Worse than Moderate” includes unhealthy for sensitive groups, unhealthy and very unhealthy.

                                           
                                              AIR QUALITY INDEX IN GEORGIA
                                 Source: Georgia Department of Natural Resources

 

GEORGIA Good Moderate Worse than Moderate Unhealthy for sensitive groups Unhealthy Very Unhealthy Not Available
2000 63.4% 12.1% 3.7% 2.9% 0.7% 0.1% 20.9%
2001 61.2% 12.5% 1.4% 1.3% 0.1% 0.0% 24.9%
2002 62.3% 12.8% 2.5% 2.2% 0.3% 0.0% 22.4%
2003 58.9% 26.5% 1.4% 1.2% 0.2% 0.0% 13.3%
2004 52.3% 40.4% 2.9% 2.8% 0.0% 0.0% 4.4%
2005 46.0% 47.3% 3.2% 3.1% 0.1% 0.0% 3.4%
2006 44.4% 51.9% 3.3% 2.7% 0.5% 0.1% 0.5%
2007 49.7% 43.1% 4.5% 3.7% 0.8% 0.0% 2.7%
2008 55.5% 39.3% 2.4% 2.2% 0.2% 0.1% 2.7%
2009 60.9% 32.8% 1.0% 0.9% 0.1% 0.0% 5.3%
2010 56.1% 39.1% 2.0% 1.7% 0.2% 0.0% 2.8%
2011 51.2% 42.0% 2.9% 2.7% 0.1% 0.0% 3.9%
2012 48.9% 30.3% 1.4% 1.3% 0.0% 0.0% 19.5%

Note: “Worse than Moderate” includes unhealthy for sensitive groups, unhealthy and very unhealthy.

 


 

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