Environmental Services Program

Blair Street, St. Louis

Site Operator:St. Louis City, Division of Air Pollution Control, Technical Services Section.

County: St. Louis City       Site ID: 29-510-0085

Pollutants Monitored: Ozone, Inhalable Particulate (PM2.5), Inhalable Particulate (PM10),
Carbon Monoxide (CO)


Ozone (O3)

Updated: Quarterly.

National Ambient Air Monitoring Standard:

Eight-hour Standard
The three-year average of the fourth highest daily maximum eight-hour average must not be greater than 0.075 ppm (parts per million). To attain this standard, the three-year average of the fourth-highest daily maximum eight-hour average ozone concentrations measured at each monitor within an area over each year must not exceed 0.075 ppm.  (Effective May 27, 2008).

Exceedances allowed without a violation being recorded:
The term exceedance does not apply to the eight-hour standard. The three-year average is used to determine designation of attainment or non-attainment.

Disclaimer: Yearly and quarterly data shown below has been subject to data review and validation procedures by the reporting agency. Monthly data and data shown graphically is raw, unreviewed and unvalidated data.

Ozone (O3)

The units for all averages in this chart are parts per million.
Year Number of Days
Over Standard
Maximum
1-Hour Average
Maximum
8-Hour Average
Fourth Maximum
8-Hour Average
2005 6 .122 .099 .089
2006 6 .106 .085 .076
2007 4 .121 .102 .087
2008 1 .095 .076 .073
2009 1 .112 .092 .065
2010 1 0.102 0.078 0.071
More Present data availible on the Blair Street NCore Page
First Quarter        
Second Quarter  
Third Quarter  

 


Inhalable Particulate (PM2.5)

Updated: Quarterly.

National Ambient Air Monitoring Standard: (24-hour samples; one taken every third day)  A three-year average of the 98th percentile 24-hour averages equal or greater than 35 ug/m3 (micrograms per cubic meter) and/or a three-year average of annual averages equal or greater than 15.0 ug/m3 (micrograms per cubic meter).

Exceedances allowed without a violation being recorded: Two percent of daily observations.

Disclaimer: Yearly and quarterly data shown below has been subject to data review and validation procedures by the reporting agency. Monthly

Inhalable Particulate (PM2.5)

The units for all averages in this chart are micrograms per cubic meter.
Year First Maximum
24-Hour Average
Second Maximum
24-Hour Average
Annual
Average
1999 64.5 50.9 17.28
2000 45.2 43.1 16.26
2001 52.5 41.4 15.2
2002 56.6 52.1 15.4
2003 50.6 42.8 14.1
2004 42.9 34.0 13.17
2005 47.5 46.1 16.06
2006 34.6 34.2 13.36
2007 50.4 47.1 13.94
2008 38.3 36.7 12.89
2009 27.1 27.1 11.51
Year First Maximum
24-Hour Average
98th Percentile Value Annual
Average
2010 70.7 26.8 12.62
More Present data availible on the Blair Street NCore Page
Through
First Quarter
     

 


Inhalable Particulate (PM10)

Updated: Quarterly.

National Ambient Air Monitoring Standard: (24-hour samples; 1 taken every 6th day) A 24-hour average of 150 ug/m3 (micrograms per cubic meter) and/or an annual average of 50 ug/m 3 (micrograms per cubic meter).

Exceedances allowed without a violation being recorded: None.

Disclaimer: Yearly and quarterly data shown below has been subject to data review and validation procedures by the reporting agency.

Inhalable Particulate (PM10)

The units for all averages in this chart are micrograms per cubic meter.
Year Number of
Exceedances
Annual
Average
Maximum
24-Hour Average
2004 0 23.4 47
2005 0 31.0 66
2006 0 26.8 74
2007 0 29.4 58
2008 0 21.9 59
2009 0 17.1 43
2010 0 22.5 47
More Present data availible on the Blair Street NCore Page
First Quarter      
Second Quarter  
Third Quarter  


Carbon Monoxide (CO)

Updated: Quarterly.

National Ambient Air Monitoring Standard: A one-hour average of 35 ppm (parts per million) and/or an eight-hour average of 9 ppm (parts per million).

Exceedances allowed without a violation being recorded: None.

Disclaimer: Yearly and quarterly data shown below has been subject to data review and validation procedures by the reporting agency.

Carbon Monoxide (CO)

The units for all averages in this chart are parts per million.
Year Number of
Exceedances
Maximum
8-Hour Average
Maximum
1-Hour Average
2005 0 2.2 2.8
2006 0 2.1 3.7
2007 0 2.0 2.7
2008 0 3.5 4.8
2009 0 2.4 5.0
2010 0 1.9 2.3
More Present data availible on the Blair Street NCore Page
First Quarter      
Second Quarter  
Third Quarter  

 

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