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

County: Monroe         Site ID: 29-137-0001

Pollutants Monitored: Ozone (O3)


Ozone (O3)

Updated: Quarterly.   Ozones are ran all year long at this site.

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.

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
1993 0 0.086 not available not available
1994 1 0.125 not available not available
1995 0 0.095 not available not available
1996 0 0.102 not available not available
1997 0 0.095 not available not available
1998 0 0.099 not available not available
1999 0 0.114 not available not available
2000 0 0.090 not available not available
2001 0 0.094 not available not available
2002 4 0.094 0.089 .085
2003 1 0.110 0.098 0.075
2004 0 0.074 0.068 0.061
2005 0 0.105 0.081 0.076
2006 1 0.094 0.085 0.074
2007 1 0.089 0.085 0.077
2008 0 0.075 0.071 0.064
2009 0 0.071 0.066 0.061
2010 0 0.082 0.075 0.070
Year Number of Days
Over Standard
Maximum
1-Hour Average
Maximum
8-Hour Average
Fourth Maximum
8-Hour Average
2011 0 0.079 0.076 0.070
2012 3 0.085 0.082 0.073
2013
First Quarter 0 0.066 0.061 0.059
Second Quarter 0
Third Quarter  

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.

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 13 33
1994 0 15 54
1995 0 16 53
1996 0 14 47
1997 0 13 37
1998 0 16 38
1999 0 13 42
2000 0 12 46
2001 0 14 31
2002 0 13 48
2003 0 15 38
2004 0 11.9 32
2005 0 17.4 46
2006 0 12.9 32
2007 0 13.8 33
2008 0 13.4 36
2009 0 12.7 36
2010 0 13.2 26
Instrument shut down September 2010
Continously operating TEOM was installed 06/23/2011.
Year Number of
Exceedances
Annual
Average
Maximum
24-Hour Average
2011 0 14.8 38
2012 0 14.9 37
2013
First Quarter 0 11.5 39
Second Quarter 0
Third Quarter  

 

 

Photograph of Mark Twain State Park Site


 

Inactive Pollutants


Inhalable Particulate (PM2.5)

Updated: All data shown is historical this instrument was shut down in 2007

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.

Inhalable Particulate (PM2.5)

The units for all averages in this chart are micrograms per cubic meter.
Year First Maximum
24-Hour Average
Second Maximum
24-Hour Average
Annual
Average
1999 38.9 36.3 11.3
2000 34.5 29.8 10.96
2001 33.7 32.8 11.2
2002 30.7 30.3 11.4
2003 36.5 34.4 11.4
2004 31.0 27.2 9.17
2005 39.7 34.3 12.09
2006 26.2 23.7 9.88
2007(instrument removed)


 

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