Appendix B	PM2.5 98th Percentile 24-Hour Concentration (ug/m3)								Table B-18											

AIR BASIN	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
GREAT BASIN VALLEYS														67.0	41.0	62.0				
LAKE COUNTY														9.4	11.3	46.3	15.1	9.0	10.5	21.4
LAKE TAHOE													21.0	21.0	26.0	22.0	19.0			
MOJAVE DESERT													23.5	23.0	21.0	33.0	17.0	20.0		19.0
MOUNTAIN COUNTIES													84.0	44.0	43.0	38.0	40.0	33.0	27.0	31.0
NORTH CENTRAL COAST														21.5	23.1	22.8	14.0	15.5	14.2	
NORTH COAST													27.7		29.0	39.7	36.1	23.1	15.2	17.4
NORTHEAST PLATEAU													27.0	37.0						
SACRAMENTO VALLEY												96.0	84.0	81.0	56.0	63.0	43.0	54.0	54.0	59.0
SALTON SEA													43.2	56.0	50.4	44.1	44.3	31.9	41.1	46.0
SAN DIEGO													45.1	48.7	40.8	39.3	46.9	37.4	30.2	28.4
SAN FRANCISCO BAY AREA													63.2	55.3	57.1	57.5	37.4	42.7	41.2	42.8
SAN JOAQUIN VALLEY													120.0	103.0	96.0	80.4	56.0	61.5	74.9	64.7
SOUTH CENTRAL COAST													35.4	42.4	50.7	35.2	33.4	36.7	26.3	27.6
SOUTH COAST													85.6	83.0	74.3	66.3	76.6	72.4	58.3	54.4