2002 Almanac (page 368)  Table A-55  North Coast - Mondocino 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	0.086	0.079	0.076	0.076	0.073	0.074	0.083						0.073	0.075	0.075	0.076	0.074	0.08	0.079	0.079
National 1-Hr. Design Value	0.08	0.08	0.08	0.07	0.07	0.07	0.08	0.08				0.05	0.06	0.074	0.08	0.073	0.069	0.069	0.073	0.073
Nat. 8-Hr. Design Value	0.059	0.055	0.053	0.051	0.05	0.052	0.056	0.066				0.038	0.047	0.05	0.056	0.052	0.05	0.052	0.058	0.058
Maximum 1-Hr. Concentration	0.08	0.08	0.07	0.07	0.07	0.07	0.09	0.09				0.06	0.08	0.087	0.084	0.058	0.071	0.09	0.079	0.071
Max. 8-Hr. Concentration	0.062	0.065	0.057	0.062	0.056	0.062	0.076	0.076				0.043	0.065	0.061	0.065	0.049	0.061	0.071	0.069	0.059
Days Above State Standard	0	0	0	0	0	0	0	0				0	0	0	0	0	0	0	0	0
Days Above Nat. 1-Hr. Std.	0	0	0	0	0	0	0	0				0	0	0	0	0	0	0	0	0
Days Above Nat. 8-Hr. Std.	0	0	0	0	0	0	0	0				0	0	0	0	0	0	0	0	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								101	82	60	74	51	54	62	54	56	66	50	66	49
Max. Annual Geometric Mean									26.4	20.9	22.5	20.1	20.5	20.2	23.4	21.6	20.7	19.6		19.8
Calc Days Above State 24-Hr Std								54	42	30	12	6	9	24	12	6	6	0	12	0
Calc Days Above Nat 24-Hr Std								0	0	0	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					5.2	5.2							2.4		3.2	3.4	3.3	3.1	3.6	3.4
Max. 1-Hr. Concentration				6	8	6		1				1	6		5.4	4.8	7.4	4.8	5.2	3.1
Max. 8-Hr. Concentration				4.1	5.5	3.1		1				0.6	2.4		3.2	2.7	3.2	3.5	3.7	2.4
Days Above State 8-Hr. Std.				0	0	0		0				0	0		0	0	0	0	0	0
Days Above Nat. 8-Hr. Std.				0	0	0		0				0	0		0	0	0	0	0	0

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													0.054	0.053	0.053	0.053	0.049	0.05	0.054	0.053
Max. 1-Hr. Concentration								0.03				0.08	0.05	0.079	0.078	0.044	0.061	0.052	0.066	0.042
Max. Annual Average														0.008	0.009		0.01	0.01	0.01	0.011

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													0.01	0.01						
Max. 24-Hr. Concentration								0.01				0.01	0	0
Max. Annual Average								0				0	0	0