Available Substances Order a Data CD Toxics Statistics Home Page Data Descriptions Page
California Home ARB: Home Search Site Map Links Software Contact Us AQD: Home
California Air Resources Board

Annual Statewide Toxics Summary
ARB's ADAM Air Quality Database
Iron
nanograms per cubic meter
Year Months
Present
Minimum Median Mean 90th
Percentile
Maximum Standard
Deviation
Number of
Observations
Detection
Limit
2002
25 1300 1550 3100 7100 1120 491 1
2001
56 1000 1330 2700 7700 1060 505 2
2000
38 1100 1310 2600 6300 1000 472 2
1999
33 990 1290 2800 6900 1110 565 2
1998
14 780 1040 2200 6100 918 561 2
1997
30 900 1110 2200 5400 863 557 2
1996
25 860 1070 2300 7000 880 595 2
1995
27 920 1200 2600 5900 1050 602 2
1994
41 930 1150 2300 5100 862 585 2
1993
41 960 1210 2400 6300 1030 575 2
1992
20 880 1180 2400 15000 1130 554 2
1991
20 1000 1370 2800 15000 1270 567 2
1990
110 1400   3300 7700 1200 309 2
1989
            0  
Graph It!
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.