Air Quality - Orange County

Orange County, California

Number of Days Exceeding Federal & State Air Quality Standards per Year
Orange County
Tables are for Los Angeles County portions of the South Coast & Mojave Desert Air Quality Management Districts

Orange County Portion of South Coast Air Quality Management District (Map)

Year	*OZONE (ppm)**		Respirable Particle Matter (Pm¹⁰)(ug/m³)		*CARBON MONOXIDE (ppm)**
Year	Days Above State 1-Hr. Standard (0.09 ppm*)	Days Above Federal 1-Hr. Standard (0.12 ppm*)	Calculated Days Above State 24-Hr. Standard (50 ug/m³)**	Calculated Days Above Federal 24-Hr. Standard (150 ug/m³)**	Days Above State 8-Hr. Standard (9.0 ppm*)	Days Above Federal 8-Hr. Standard (9.0 ppm*)
2001	12	1	53	0	0	0
2000	14	2	45	0	0	0
1999	8	0	90	0	0	0
1998	22	6	72	0	0	0
1997	13	3	62	0	0	0
1996	27	6	36	0	0	0
1995	39	4	75	7	0	0
1994	46	9	66	0	0	0
1993	59	17	78	0	0	0
1992	63	35	66	0	3	0
1991	71	32	84	0	0	0
1990	80	37	112	6	6	5
Year	*OZONE (ppm)**		Respirable Particle Matter (Pm¹⁰)(ug/m³)		*CARBON MONOXIDE (ppm)**
Year	Days Above State 1-Hr. Standard (0.09 ppm*)	Days Above Federal 1-Hr. Standard (0.12 ppm*)	Calculated Days Above State 24-Hr. Standard (50 ug/m³)**	Calculated Days Above Federal 24-Hr. Standard (150 ug/m³)**	Days Above State 8-Hr. Standard (9.0 ppm*)	Days Above Federal 8-Hr. Standard (9.0 ppm*)
1989	81	38	126	0	13	12
1988	96	45	90	0	9	7
1987	81	42	---	---	3	2
1986	101	53	---	---	4	4
1985	101	63	---	---	9	7
1984	107	65	---	---	7	5
1983	110	65	---	---	8	8
1982	79	42	---	---	13	9

* ppm - parts per million
** Tiny solid or liquid particles of soot, dust, smoke, fumes, or mists. The size of the particles (10 microns or smaller, about 0.0004 inches or less) allows them to enter the air sacs deep in the lungs where they may be deposited to the result in adverse health effects. Also causes visibility reduction. Data listed here are reported as 24-hour average concentrations in ug/m³ (weight of particles in micrograms per one cubic meter of air).

Source: California Air Resources Board

Smog Kills. According to the South Coast Air Quality Management District, an estimated 1,600 people die prematurely each year in the greater Los Angeles/Orange County region due to smog. Thousands more suffer temporary or long-term health effects and millions more are at least inconvenienced.

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