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California Air Resources Board

Annual Toxics Summary
ARB's ADAM Air Quality Database
Azusa
Aluminum
nanograms per cubic meter
Year Months
Present
Minimum Median Mean 90th
Percentile
Maximum Standard
Deviation
Number of
Observations
Detection
Limit
2002
610 2100 2770 5900 6600 1810 26 4
2001
55 2300 2300 3800 5500 1360 28 5
2000
250 2300 2280 4600 5700 1410 28 5
1999
5300       5300 411 1 5
1998
            0  
1997
            0  
1996
            0  
1995
            0  
1994
            0  
1993
            0  
1992
            0  
1991
            0  
1990
            0  
1989
            0  
Notes Values below the Limit of Detection (LoD) assumed to be ½ LoD.
Means and risks shown only for years with data in all 12 months.
Risks shown only for those substances with unit risk factors.