2002 Almanac (page 356)  Table A-43  Mountain Counties - El Dorado 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									0.138			0.127	0.122	0.127	0.131	0.137	0.14	0.147	0.144	0.144
National 1-Hr. Design Value									0.12			0.12	0.12	0.124	0.124	0.126	0.123	0.143	0.144	0.143
Nat. 8-Hr. Design Value									0.103			0.098	0.095	0.097	0.099	0.103	0.099	0.103	0.103	0.107
Maximum 1-Hr. Concentration									0.13			0.12	0.12	0.13	0.126	0.136	0.145	0.163	0.144	0.128
Max. 8-Hr. Concentration									0.11			0.112	0.108	0.104	0.113	0.113	0.106	0.127	0.118	0.113
Days Above State Standard									21			29	10	26	32	41	19	32	39	37
Days Above Nat. 1-Hr. Std.									2			0	0	2	1	3	1	6	4	2
Days Above Nat. 8-Hr. Std.									24			29	12	22	31	36	16	26	40	31

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								56	59	89		103	62	34	53	58	62	41	49	38
Max. Annual Geometric Mean													15.7	16.4	15.3		15.7	13	15.8	
Calc Days Above State 24-Hr Std								6	18	12		6	6	0	6	6	6	0	0	0
Calc Days Above Nat 24-Hr Std								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									4.1	4.3		1.6	1.3	1.3	1.2	1	1	0.9	0.8	0.8
Max. 1-Hr. Concentration									6	5		3	2	1.7	1.6	1.3	1.6	1.7	1.4	2.7
Max. 8-Hr. Concentration									4.6	3.5		2.4	1.5	1	1	0.9	0.8	0.9	0.9	1
Days Above State 8-Hr. Std.									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

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 El Dorado County lies within the Lake Tahoe Air Basin.