2002 Almanac (page 426)  Table B-15  Carbon Monoxide:  Maximum 8- Hour Concentration (ppm)																				

AIR BASIN	1981	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000
GREAT BASIN VALLEYS	6.4	10.8	7.9	7.3	7.4	6	6.3	5	5.4	4.4	5	4.4	4.5	5.4	5.4	3	3.4	3		2.5
LAKE COUNTY	2.1								2.2	2.6	3.1									
LAKE TAHOE	15.4	18.3	17.4	14.8	16.3	12.5	13	12.5	11.3	10.1	9.2	9.9	7.5	7.1	6.3	5.1	3.8	4.3	2.4	2.8
MOJAVE DESERT	7.4	5	6.3	4.9	5.7	4.6	4	5.9	7.1	8.3	7.1	5.4	5.9	5.6	5	7.5	4	3.6	5.4	4.3
MOUNTAIN COUNTIES	16					4.2	2.3		4.6	3.5	0.1	4.5	5.4	5.4	3.4	2.6	1.9	5.5	3	1.6
NORTH CENTRAL COAST	2.9	2.6	2.1	3	3.3	2.3	2.3	2.4	2.4	2.5	2.5	2.9	2.7	2.1	2.1	2.6	1.8	2.2	1.8	1.4
NORTH COAST				4.1	5.5	3.1	3	1	4.5	3.5		0.6	2.4		3.2	2.7	3.2	3.5	3.7	2.4
NORTHEAST PLATEAU							10.4	1.8												
SACRAMENTO VALLEY	13.5	15.1	14.1	12.4	13.3	13.9	10	12.3	15.9	14	12.3	8.6	9.4	8.4	7.4	7.2	7.2	7.1	6.6	6.3
SALTON SEA	3.8	2.6	2.8	2.1	2.6	3.6	2.9	2.1	2.9	2.3	2.5	2.4	2	13.1	22.9	22.1	17.8	14.4	17.9	15.5
SAN DIEGO	11.3	10.3	12.1	8.5	13	10.4	9.4	10.3	10.5	9.1	7.9	7.9	7.5	7.5	6.3	7.1	5.4	4.8	6	5.9
SAN FRANCISCO BAY AREA	11	14.5	10.6	12.1	16.1	12.6	10	12.8	12	11	11	7.8	7.9	8.8	5.8	7	6.1	6.3	6.3	7
SAN JOAQUIN VALLEY	13.6	14.8	14.3	15.7	11	16.3	12.9	16.5	13.4	11.5	11.4	8.3	9.3	8.9	9.1	7.7	7.5	8	7.8	6.6
SOUTH CENTRAL COAST	9.2	8.7	9	10	10.5	8.6	7.5	7.4	7.4	5.8	6.4	5.9	4.8	6.5	5.8	4.9	4	4.6	4.2	4.3
SOUTH COAST	25.5	21.3	20.9	19.7	27.7	19.7	19.6	27.5	21.8	16.8	17.4	18.8	14.6	18.2	13.8	17.5	17.1	13.3	11.2	10.1