Environmental Services Program

Watkins Mill State Park

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

County: Clay              Site ID: 29-047-0003

Pollutants Monitored: Ozone (O3)


Ozone (O3)

Updated: Quarterly

National Ambient Air Monitoring 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 0.105 not available not available
1994 0 0.110 not available not available
1995 3 0.163 not available not available
1996 0 0.104 not available not available
1997 0 0.122 not available not available
1998 1 0.130 not available not available
1999 0 0.109 not available not available
2000 0 0.119 not available not available
2001 0 0.109 not available not available
2002 3 0.104 0.091 0.083
2003 4 0.107 0.096 0.085
2004 0 0.081 0.073 0.067
2005 1 0.100 0.086 0.079
2006 4 0.116 0.105 0.091
2007 4 0.098 0.084 0.073
2008 0 0.095 0.073 0.069
2009 3 0.094 0.079 0.074
2010 0 0.103 0.075 0.073
2011 7 0.112 0.094 0.080
2012 12 0.117 0.094 0.086
Year Number of Days
Over Standard
Maximum
1-Hour Average
Maximum
8-Hour Average
Fourth Maximum
8-Hour Average
2013
Second Quarter 0 0.089 0.072 0.062
Third Quarter  

Photograph of Watkins Mill site

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