Appendix B	PM2.5 - Average of Quarterly Means (National) (ug/m3)								Table B-20											

AIR BASIN	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004
GREAT BASIN VALLEYS																	5.5	8.4		
LAKE COUNTY																4.3	4.2	6.3	4.4	4.4
LAKE TAHOE															8.3	7.8	8.2		7.2	
MOJAVE DESERT															11.9	12	11.5	13.9	11.4	10.8
MOUNTAIN COUNTIES															11.1	9	15.6	9.9	13.3	11.7
NORTH CENTRAL COAST															9.8	7.9	9.1	9.1	7.4	7
NORTH COAST															9.1	9.1	9.4	9.1	7.4	8.2
NORTHEAST PLATEAU															7.9	8.5				
SACRAMENTO VALLEY															17.5	15.8	13	15.1	12.2	15.1
SALTON SEA															15.2	16.9	12.2	15.1	11.4	11.8
SAN DIEGO															18	15.8	17.7	16	15.5	14.1
SAN FRANCISCO BAY AREA																13.6	12.5	13.8	11.7	11.6
SAN JOAQUIN VALLEY															27.7	23.9	22.5	24.1	19.7	18.9
SOUTH CENTRAL COAST															13.8	10.3	14.9	14.6	14.2	12.6
SOUTH COAST															31	28.3	31	27.4	24.8	22.1