2002 Almanac (page 366)  Table A-53  North Coast - Del Norte 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	0.05							0.062	0.058	0.066	0.063	0.063	0.062	0.063	0.062					
National 1-Hr. Design Value	0.04						0.039	0.059	0.059	0.06	0.06	0.06	0.06	0.06	0.06					
Nat. 8-Hr. Design Value	0.04						0.035	0.043	0.042	0.053	0.051	0.051	0.05	0.051	0.049					
Maximum 1-Hr. Concentration	0.05						0.04	0.068	0.05	0.07	0.06	0.07	0.06	0.064	0.056					
Max. 8-Hr. Concentration	0.042						0.038	0.06	0.042	0.06	0.051	0.061	0.053	0.061	0.052					
Days Above State Standard	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					
Days Above Nat. 8-Hr. Std.	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								46							41	42	58	48	39	44
Max. Annual Geometric Mean																	18.8		15.2	15.6
Calc Days Above State 24-Hr Std								0							0	0	3	0	0	0
Calc Days Above Nat 24-Hr Std								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	0.02																			
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	0
Max. Annual Average	0