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)
Updated: Within 90 days after the end of a quarter.
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. Monthly data and data shown graphically is raw, unreviewed and unvalidated data.
|2002 (instrument removed 4th Quarter)|
|(instrument reinstalled 2004)|
|First Quarter||not available||not available||not available|
|Second Quarter||not available|
|Third Quarter||not available|