Chapter 4	PM2.5 Air Quality Table						Table 4-22													

PM25 (ug/m3)	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
Max. 24-Hr. Concentration (State)													90.5	67.2	107.5	84.5	56.1	73.7	55.6	75.3
Max. 24-Hr. Concentration (Nat)													90.5	67.2	107.5	76.7	56.1	73.7	54.6	75.3
98th Percentile of 24-Hr Conc.													63.2	55.3	57.1	57.5	37.4	42.7	41.2	42.8
Annual Average (State)														11.6	12.9	14.0	11.7	12.7	11.8	12.4
Avg. of Qtrly. Means (Nat)													16.8	13.6	12.8	14.0	11.7	11.1	10.5	9.3