Environmental Services Program

Blair Street, St. Louis, NCore Site

Site Operator: Missouri Department of Natural Resources' Environmental Services Program.

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

Pollutants Monitored: Ozone, Inhalable Particulate (PM2.5), Inhalable Particulate (PM10),
Carbon Monoxide (CO) Trace,
Trace Level Sulfur Dioxide (SO2),   Lead (Pb), Nitrogen Oxides (NOy)

Note: All historical data for this site can be found at the Blair Street webpage. This page contains data since the site was designated as an EPA NCore air monitoring site. 

NCore is a multi pollutant network that integrates several advanced measurement systems for particles, pollutant gases and meteorology.

The NCore Network addresses the following objectives:

More information about this can be found at EPA's site.

Lead (Pb)

Updated: Data is updated monthly.  Max three-month and 24-hour averages are updated quarterly on a 90-day delay.

National Ambient Air Monitoring Standard:

Primary: 0.15 µg/m3
Secondary: Same as the primary standard

On Nov. 12, 2008, EPA substantially strengthened the National Ambient Air Quality Standards for lead (see 73 FR 66964).  EPA lowered the level of the primary (health-based) standard from 1.5 micrograms per cubic meter (µg/m3) to 0.15 µg/m3, measured as total suspended particles.  EPA also revised the secondary (welfare-based) standard to be identical to the primary standard. 

The standard is based on the highest rolling three-month average over a period of three years and two months. The standard is met at a monitoring site when the three-month average is less than or equal to 0.15 μg/m3. For specific rules and technical information, consult 40 CFR Pt. 50, Appendix R.

Disclaimer: The following data is calculated using the lead National Ambient Air Quality Standards regulations. Yearly and quarterly data shown below has been subject to data review and validation procedures by the department. Monthly data has been reviewed and verified by the monitoring agency. 

Data Table: Updated monthly

The units for all averages in this table are micrograms per cubic meter. Data in this table, is calculated at local conditions using daily average temperature and barometric pressure. Lead is sampled on a set schedule.  Results in this table are a combination of samples for this site taken on an every sixth day run schedule.

Lead (Pb)

The units for all averages in this chart are micrograms per cubic meter.
Year Month Monthly
Average
3-Month
Rolling Average
Month Monthly
Average
3-Month
Rolling Average
 
2014 January     July    
February     August    
March     September    
April     October    
May     November    
June     December    
             
2013 January 0.015 0.03 July 0.026825 0.02
February 0.01196 0.02 August 0.02216 0.02
March 0.01126 0.01 September 0.0205 0.02
April 0.01996

0.01

October 0.01378 0.02
May 0.00948 0.01 November 0.0085 0.01
June 0.02202 0.02 December 0.01402 0.01
 
2012 January 0.02108 0.02 July 0.028175 0.02
February 0.03276 0.02 August 0.023616 0.03
March 0.02076 0.02 September 0.03158 0.03
April 0.03314 0.03 October 0.01206 0.02
May 0.01215 0.02 November 0.02052 0.02
June 0.03088 0.03 December 0.04564 0.03
             
2011 November 0.01586 NA December 0.018675 NA

 

Ozone (O3)

Updated: Quarterly. Ozone data is collected year round at this site.

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
First Quarter 0 0.075 0.065 0.062
Second Quarter  
Third Quarter  
2013
2012 15 0.115 0.095 0.087
2011 11 0.119 0.097 0.079
2010 1 0.102 0.078 0.071

 


Inhalable Particulate (PM2.5)

Updated: Quarterly.

National Ambient Air Monitoring Standard: (24-hour samples; taken evey 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.

Inhalable Particulate (PM2.5)

The units for all averages in this chart are micrograms per cubic meter.
Year First Maximum
24-Hour Average
98th Percentile Value Annual
Average
Through Second Quarter 27.7 22.3 10.04
2013
2012 32.8 25.1 11.09
2011 38.8 27.2 12.57
2010 70.7 26.8 12.62

 


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
First Quarter 0 19.1 43.0
Second Quarter 0
Third Quarter  
2013
2012 0 23.1 58
2011 0 23.1 51.0
2010 0 22.5 47


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 billion.
Year Number of
Exceedances
Maximum
8-Hour Average
Maximum
1-Hour Average
Second Quarter 0 1.1 2.3
2013
2012 0 1.1 1.1992
2011 0 1.5 1.892
2010 0 1.9 2.3

 


Nitrogen Oxides (NOy)

Updated: Quarterly.

National Ambient Air Monitoring Standard: There is no standard yet for NOy it is colleced because it is a good indicator of NOx reduction strategies, it is valuable for ecosystem assessments, it is important for model evaluation and it supports NO2 estimates for health effects studies.

Exceedances allowed without a violation being recorded: There is currently no exceedance levels for this pollutant

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

Nitrogen Oxides (NOy)

The units for all averages in this chart are parts per billion.
Year 1st Max 4th Max Annual Average
2013
 Through Second Quarter 303.2 239.5 18.48
Third Quarter 2012 322 237.4 20.87
2011 349.8 244.1 22.71

 

 


 

Sulfur Dioxide (SO2)

Updated: Quarterly

National Ambient Air Monitoring Standard: A three-hour average of 0.50 ppm (parts per million) and/or a 24-hour average of 0.14 ppm (parts per million) and/or an annual average of 0.03 ppm (parts per million). Data reported in three decimal places must be rounded to two decimal places.

Exceedances allowed without a violation being recorded: One per year

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.

Sulfur Dioxide (SO2)

The units for all averages in this chart are parts per billion.
Year Number of
Exceedances
Annual
Average
Maximum
1-Hour Average
Maximum
24-Hour Average
99th Percentile 1-Hour Average
First Quarter 0 2.43 41.0 10.8 35.0
Second Quarter 0
Third Quarter  
2013
2012 0 2.74 86.5 14.9 56.4
2011 0 2.58 64.0 13.9 43.0
2010 0 2.05 38.1 8.9 38.1

Photograph of Blair Street

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