Environmental Services Program

Pershall Road, Ferguson

Site Operator: St. Louis County Department of Health, Air Pollution Monitoring Program

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; one taken every sixth 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
1993 0 22 58
1994 0 24 75
1995 0 24 61
1996 0 20 58
1997 0 20 42
1998 0 23 55
(1999  Instrument removed from site)
(2001 Instrument reinstalled third quarter)
2001 0 21 39
2002 0 17 57
2003 0 17 39
2004 0 20.6 76
2005 0 32.7 75
2006 0 14.6 33
2007 0 16.5 55
2008 0 84 14.3
Site shut down in September 2008

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