Environmental Services Program

North Market, St. Louis City

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

(Site was shut down 4/1/07. The PM-10 instrument was moved to Branch Street.)

Pollutants Monitored: Inhalable Particulate (PM10)


Inhalable Particulate (PM10)

Updated: Within 90 days after the end of a quarter.

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. Monthly data and data shown graphically is raw, unreviewed and unvalidated data.

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
2002 11 50.9 341
2002 (instrument removed 4th Quarter)
(instrument reinstalled 2004)
2004 11 49.4 205
2005 9.4 56.9 201
2006 21 68.3 319
2007
First Quarter not available not available not available
Second Quarter not available
Third Quarter not available

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