Appendix A	Mojave Desert Air Basin - County: Riverside - MD					Table A-39														

OZONE (ppm)	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001
Peak 1-Hour Indicator				0.143	0.138	0.144	0.142	0.141	0.132	0.14	0.146	0.146								
4th High 1-Hr in 3 Yrs				0.11	0.14	0.147	0.147	0.14	0.131	0.13	0.13	0.131								
Avg of 4th Hi 8-Hr in 3 Yrs				0.092	0.096	0.101	0.103	0.102	0.096	0.099	0.101	0.101								
Maximum 1-Hr. Concentration				0.14	0.16	0.148	0.14	0.14	0.13	0.13	0.138	0.14								
Max. 8-Hr. Concentration				0.102	0.105	0.127	0.105	0.117	0.102	0.115	0.115	0.108								
Days Above State Standard				19	39	65	32	31	23	33	44	18								
Days Above Nat. 1-Hr. Std.				3	3	10	4	2	1	6	7	1								
Days Above Nat. 8-Hr. Std.				8	30	49	16	20	18	37	39	16								

PM10 (ug/m3)	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001
Max. 24-Hour Concentration										112	242									85
Max. Avg. of Quarters																				
Calc Days Above State 24-Hr Std										54	42									36
Calc Days Above Nat 24-Hr Std																				

CARBON MONOXIDE (ppm)	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001
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)	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001
Peak 1-Hr. Indicator																				
Max. 1-Hr. Concentration																				
Max. Annual Average																				

SULFUR DIOXIDE (ppm)	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001
Peak 1-Hr. Indicator																				
Max. 24-Hr. Concentration																				
Max. Annual Average																				

Portions of Riverside County lie within the Salton Sea and South Coast Air Basin