2002 Almanac (page 369)  Table A-56  North Coast - Sonoma County - Air Quality Trends*																				

OZONE (ppm)	1981	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000
Peak 1-Hour Indicator												0.085	0.088	0.089	0.09	0.088	0.091	0.103	0.109	0.105
National 1-Hr. Design Value												0.08	0.09	0.09	0.09	0.09	0.09	0.11	0.11	0.11
Nat. 8-Hr. Design Value												0.063	0.065	0.066	0.069	0.069	0.072	0.077	0.082	0.076
Maximum 1-Hr. Concentration												0.09	0.09	0.1	0.1	0.08	0.1	0.13	0.1	0.09
Max. 8-Hr. Concentration												0.072	0.073	0.08	0.09	0.071	0.091	0.106	0.087	0.077
Days Above State Standard												0	0	1	1	0	2	7	4	0
Days Above Nat. 1-Hr. Std.												0	0	0	0	0	0	1	0	0
Days Above Nat. 8-Hr. Std.												0	0	0	1	0	1	5	2	0

PM10 (ug/m3)	1981	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000
Max. 24-Hour Concentration								86	85	266	78	58	53	57	43	40	54	32	71	44
Max. Annual Geometric Mean								23.3		19.3			17.3	16.8		14.7	14.6	14.8	16.2	9.7
Calc Days Above State 24-Hr Std								21	30	21	30	6	12	12	0	0	3	0	12	0
Calc Days Above Nat 24-Hr Std								0	0	6	0	0	0	0	0	0	0	0	0	0

CARBON MONOXIDE (ppm)	1981	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000
Peak 8-Hr. Indicator																				
Max. 1-Hr. Concentration																				
Max. 8-Hr. Concentration																				
Days Above State 8-Hr. Std.																				
Days Above Nat. 8-Hr. Std.																				

NITROGEN DIOXIDE (ppm)	1981	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000
Peak 1-Hr. Indicator																				
Max. 1-Hr. Concentration																				
Max. Annual Average																				

SULFUR DIOXIDE (ppm)	1981	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000
Peak 1-Hr. Indicator																				
Max. 24-Hr. Concentration
Max. Annual Average

*  A portion of Sonoma County lies within the San Francisco Bay Area Air Basin