Average light extinction (1/Mm) of the major aerosol chemical components in 20% best, middle 60% and 20% worst days based on data available during the year of 1997-2002

Location	Data	Rayleigh	Sulfate	Nitrate	OMC	LAC	Soil	CM	Aerosol Ext	Bext	Visual Range (Km)	Deciview
WHPA1	20% Best	10.00	1.26	0.33	0.29	0.19	0.05	0.20	2.32	12.32	316.44	2.09
WHPA1	Middle 60%	10.00	5.80	1.21	1.85	0.72	0.23	0.67	10.48	20.48	190.43	7.17
WHPA1	20% Worst	10.00	11.90	2.76	6.56	1.78	0.52	1.81	25.32	35.32	110.41	12.62
WHPA1	Average	10.00	6.15	1.35	2.50	0.83	0.25	0.81	11.90	21.90	178.08	7.84

Mass concentrations of the major aerosol chemical components and PM_2.5 (mg/m³) in 20% best, middle 60% and 20% worst days based on data available during the year of 1997-2002

Location	Data	Sulfate	Nitrate	OMC	LAC	Soil	CM	PM2.5
WHPA1	20% Best	0.11	0.03	0.07	0.02	0.05	0.34	0.82
WHPA1	Middle 60%	0.54	0.11	0.46	0.07	0.23	1.12	1.84
WHPA1	20% Worst	1.22	0.26	1.64	0.18	0.52	3.02	3.44
WHPA1	Average	0.59	0.12	0.63	0.08	0.25	1.35	1.97