2004

2006

2007

 Monitor

 First High

 Second Highest

 Third Highest

 Fourth Highest

 MISSOURI

 April 1-October 31, 2005

 Arnold

 100

 97

 93

 92

 West Alton

 101

 95

 91

 89

 Orchard Farm

 98

 96

 93

 92

 Queeny Park

 98

 90

 88

 82

 Maryland Heights

 97

 94

 89

 88

 Sunset Hills

 108

 93

 90

 89

 Pacific

 99

 92

 87

 87

 Blair St.

 99

 93

 91

 89

 Margaretta

 96

 94

 92

 91

 Foley +

 104

 93

 93

 89

 Bonne Terre +

 93

 85

 84

 84

 ILLINOIS

 May 1-September 30, 2005

 Wood River

 99

 93

 91

 87

 Maryville

 104

 95

 92

 88

 Alton

 102

 96

 92

 91

 East St. Louis

 110

 103

 101

 94

 Jerseyville

 89

 87

 87

 86

 Nilwood +

 86

 80

 78

 77

 Houston +

 79

 78

 74

 74

  Measured in Parts per Billion (ppb)

 + Monitors are outside the St. Louis 8-hour ozone non-attainment area

 8-hour ozone standard is 85 ppb

 Based on information from Missouri Department of Natural Resources and Illinois Environmental Protection Agency

 Information is preliminary and has not been quality assured

2004

2006

2007

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East-West Gateway Council of Governments
One Memorial Dr., Ste 1600
St. Louis, MO 63102
phone: (314) 421-4220 or (618) 274-2750
  fax: (314) 231-6120
e-mail: webmaster@ewgateway.org

last update: Thursday, August 23, 2007