Data Summary Graphs

 

The data summary graphs listed below demonstrate how Vermont's air quality compares to the National Ambient Air Quality Standards (NAAQS). These data summary graphs show the trends relative to the NAAQS through 2016 and are updated on a yearly basis. 

 

Ozone (O3) 8-Hour Average

Value for each year is the average of the EPA design value:* for the previous three-years.

Reference: EPA Design Value Report AMP480 7/24/17

O3 graph data

*Annual fourth-highest daily maximum eight-hour concentration

*NAAQS updated in 2015

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Carbon Monoxide (CO) Second Max. 1-Hour Average 

One-Hour average NAAQS, accessed relative to the annual second maximum one-hour average.

Reference: EPA QuickLook Report AMP450 7/24/17

CO 1 Hour

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Carbon Monoxide (CO) Second Max. 8-Hour Average

Eight-hour average NAAQS, accessed relative to the annual second maximum eight-hour average.

Reference: EPA QuickLook Report AMP450 7/24/17

 

CO Max Eight Hour Average

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Nitrogen Dioxide (NO2) 1-Hour Average 

Value for each year is the average of the EPA design value:* for the previous three-years.

Reference: EPA Design Value Report AMP480 7/25/17

 

MAX NO2  1 hour value

*98th percentile of one-hour daily maximum concentrations

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Nitrogen Dioxide (NO2) Annual Average 

Annual average NAAQS, accessed value for each year is the average of the one-hour averages.

Reference: EPA Quicklook Report AMP450 8/7/17

 

NO2 Annual Average

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Sulfur Dioxide (SO2) 1-Hour Average

Value for each year is the average of the EPA design value:* for the previous three-years.

 Reference: EPA Design Value Report AMP480 8/7/17

 

MAX SO2 1 hour value

*Annual 99th percentile one-hour average.

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Sulfur Dioxide (SO2) Second Max. 3-Hour Average

Three-hour average secondary NAAQS, assessed relative to the annual second maximum three-hour block average of one-hour

Reference: EPA Reduced Frequency Report AMP260 7/25/17

 

SO2 3 hour MAX annual average

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Fine Particulate (PM2.5) Annual Average

Annual averages used for 2001-2014 are based on the average of twenty four hour filter-based samples collected every three-days, annual averages for 2015-2016 are based on continuous average one-hour. Value for each year is the average of the EPA design value:* for the previous three-years.

Reference: EPA Design Value Report AMP480 8/7/17

Fine Particulate Annual Average

*Annual mean, averaged over 3 years

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Fine Particulate (PM2.5) 24-Hour Average

Annual averages used for 2001-2014 are based on the average of twenty four hour filter-based samples collected every three-days, annual averages for 2015-2016 are based on continuous average one-hour. Value for each year is the average of the EPA design value:* for the previous three-years.

Reference: EPA Design Value Report AMP480 8/7/17

 

PM2.5 24 Hour Average Report

*Three-year average of the annual 98th percentile twenty four-hour average.

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