1999-2007 Weekly 8-Hour Ozone Averages by Monitor (1997 8-Hour Ozone Standard of 85 ppb) – East-West Gateway Council of Governments (EWGCOG)

EWG prepares tables showing the daily maximum eight-hour ozone average, in parts per billion (ppb), by air quality monitor in the St. Louis (MO-IL) region. The tables listed below use the 1997 standard of 85 ppb (years 1999-2007). Exceedance of 1997 standard is 86 ppb or greater.

Missouri and Illinois calculate the eight-hour average using one hour ozone concentrations.

1999 Weekly Eight-Hour Ozone Averages by Monitor

2000 Weekly Eight-Hour Ozone Averages by Monitor

2001 Weekly Eight-Hour Ozone Averages by Monitor

2002 Weekly Eight-Hour Ozone Averages by Monitor

2003 Weekly Eight-Hour Ozone Averages by Monitor

2004 Weekly Eight-Hour Ozone Averages by Monitor

2005 Weekly Eight-Hour Ozone Averages by Monitor

2006 Weekly Eight-Hour Ozone Averages by Monitor

2007 Weekly Eight-Hour Ozone Averages by Monitor

All Weekly Eight-Hour Ozone Averages by Monitor Using 85 ppb