AIR BASIN	1980	1981	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999																																			
GREAT BASIN VALLEYS	17.0	13.0	18.0	14.0	13.0	16.0	11.0	9.0	13.0	12.0	10.0	11.0	11.0	13.0	9.0	10.0	6.0	8.2	6.7																																				
LAKE COUNTY	5.0	3.0								3.0	6.0	7.0																																											
LAKE TAHOE	30.0	25.0	27.0	30.0	23.0	23.0	20.0	19.0	19.0	17.0	18.0	14.0	15.0	13.0	11.6	9.5	10.4	7.7	7.5	3.2																																			
MOJAVE DESERT	11.0	9.0	10.0	13.0	10.0	12.0	9.0	12.0	11.0	13.0	11.0	10.0	9.0	8.0	9.1	7.5	8.4	5.9	5.4	10.3																																			
MOUNTAIN COUNTIES	27.0	30.0					6.0	3.0		6.0	5.0	1.0	6.2	10.0	9.3	9.3	4.5	6.6	6.7	4.1																																			
NORTH CENTRAL COAST	5.0	4.0	6.0	3.0	5.0	6.0	4.0	5.0	6.0	5.0	5.0	4.0	4.0	4.0	4.6	3.2	5.5	4.4	3.8	3.8																																			
NORTH COAST	6.0				6.0	8.0	6.0	4.0	1.0	10.0	9.0		1.0	6.0		5.4	4.8	7.4	4.8	5.2																																			
NORTHEAST PLATEAU								12.0	4.0																																														
SACRAMENTO VALLEY	18.0	17.0	17.0	19.0	18.0	17.0	20.0	15.0	17.0	18.0	17.0	15.0	14.0	12.0	10.8	9.8	8.7	9.5	7.9	7.7																																			
SALTON SEA	8.0	6.0	5.0	7.0	4.0	5.0	5.0	5.0	4.0	6.0	5.0	5.0	5.0	6.0	30.6	32.0	27.0	24.0	23.5	22.9																																			
SAN DIEGO	15.0	15.0	15.0	16.0	16.0	17.0	16.0	14.0	17.0	17.0	18.0	14.0	14.0	11.4	11.0	9.9	12.4	9.3	10.2	9.9																																			
SAN FRANCISCO BAY AREA	27.0	16.0	18.0	17.0	20.0	21.0	20.0	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																																			
SAN JOAQUIN VALLEY	24.0	18.0	18.0	17.0	24.0	18.0	21.0	16.0	19.0	23.0	17.0	19.0	13.0	13.0	15.0	12.0	11.0	9.9	10.3	11.9																																			
SOUTH CENTRAL COAST	28.0	15.0	14.0	16.0	16.0	17.0	18.0	14.0	15.0	11.0	11.0	9.0	12.0	9.0	10.7	8.9	12.6	8.2	8.5	8.2																																			
SOUTH COAST	31.0	31.0	27.0	31.0	29.0	33.0	27.0	26.0	32.0	31.0	24.0	30.0	28.0	21.0	24.9	16.8	22.5	19.2	17.0	19.0