Chapter 4 Carbon Monoxide Air Quality Table Table 4-24 CARBON MONOXIDE (ppm) 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 Peak 8-Hr. Indicator (State) 13.4 10.7 11.8 12.6 12.5 11.1 9.3 8.1 7.8 7.4 6.5 6.7 6.5 7.1 6.9 6.0 5.5 4.0 3.7 3.5 Max. 1-Hr. Concentration 17.0 15.0 19.0 18.0 15.0 12.0 14.0 12.0 10.1 8.8 10.7 8.7 9.0 9.8 7.6 7.7 8.6 4.8 4.5 5.5 Max. 8-Hr. Concentration (State) 10.0 12.8 12.0 11.0 11.0 7.8 7.9 8.8 5.8 7.0 6.1 6.3 6.3 7.0 5.1 5.1 4.4 3.4 3.1 2.9 Days Above State 8-Hr. Std. 2 4 10 4 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Days Above Nat. 8-Hr. Std. 1 4 9 2 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0