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As part of the Ozone Data Tracking Project, the Environmental Services section of EWGCOG acts as a clearinghouse for April-October daily measured ozone data and helps to insure quality control on all
monitored data.
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OZONE MONITORS AS OF APRIL 2006
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1. Arnold (formerly Arnold Tenbrook)
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2. Orchard Farm
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3. West Alton
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4. Maryland Heights
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5. Pacific
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6. Sunset Hills (formerly S. Lindbergh)
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7. Blair
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8. Margaretta
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9. Wood River (formerly 54 Walcott)
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10. Maryville (formerly 200 W. Division)
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11. Alton (formerly 409 Main St.)
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12. East St. Louis (formerly 13th & Tudor)
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13. Jerseyville (eight-hour ozone info.)
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EWGCOG collects one-hour ozone data from the monitoring agencies for the previous day covering the period 9 a.m. to 9 p.m. CST. All monitored data is initially screened for
consistency and entered into an electronic spreadsheet program . The following tables present on a weekly basis, the one-hour maximum concentration (or value) by
monitor starting in 1998. The measurement unit is parts per billion.
For 1998-2000 one-hour ozone information is available for a monitor located on St. Charles Rock Rd. in St. Ann. In 2001 this monitor was moved to the Breckenridge Hills site.
For 1998-1999 one-hour ozone information is available for a monitor located at Newstead and Cote Brilliante in the City of St. Louis. In 2000 this monitor was moved to the Margaretta site.
For 1998-2003 one-hour ozone information is available for a monitor located on S. Broadway in the City of St. Louis. In 2004 this monitor was shut down.
As of April 2005, monitors at the following sites have either been deactivated or relocated to another location: Breckenridge Hills (data available 2001-2004); Ferguson (1998-2004);
Ladue (1998-2004); Clark in the City of St. Louis (1998-2004); and Edwardsville (1998-2004). New monitor locations in 2005 are Maryland Heights, Pacific and Blair Street in the City of St. Louis.
For 1998-2005, one-hour ozone information is available for a monitor located in Queeny Park in St. Louis County. As of April 2006, this monitor was deactivated.
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