2002 Almanac (page 367)  Table A-54  North Coast - Humboldt 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	0.07										0.049	0.049								
National 1-Hr. Design Value	0.06									0.03	0.04	0.04								
Nat. 8-Hr. Design Value	0.047									0.03	0.035	0.034								
Maximum 1-Hr. Concentration	0.07									0.04	0.05	0.04								
Max. 8-Hr. Concentration	0.051									0.031	0.042	0.04								
Days Above State Standard	0									0	0	0								
Days Above Nat. 1-Hr. Std.	0									0	0	0								
Days Above Nat. 8-Hr. Std.	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								98	92	83				77	68	87	56	43	57	51
Max. Annual Geometric Mean								31	28.2	24.4				21.1		15.9	18.8	13.2	16.4	18.3
Calc Days Above State 24-Hr Std								69	36	30				12	6	9	6	0	6	6
Calc Days Above Nat 24-Hr Std								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									4.6	4.6										
Max. 1-Hr. Concentration									10	9										
Max. 8-Hr. Concentration									4.5	3.5										
Days Above State 8-Hr. Std.									0	0										
Days Above Nat. 8-Hr. Std.									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																				
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	0
Max. Annual Average	0