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 Quality 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.

Inhalable Particulate (PM2.5)

Updated: Quarterly.

National Ambient Air Quality 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 (PM10)

Updated: Quarterly.

National Ambient Air Quality 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.

Carbon Monoxide (CO)

Updated: Quarterly.

National Ambient Air Quality 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.

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