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Annual Statewide Toxics Summary		 ARB's ADAM Air Quality Database
Iron FAQs
nanograms per cubic meter
Year Months
Present		 Minimum Median Mean 90th
Percentile		 Maximum Standard
Deviation		 Number of
Observations		 Detection
Limit
2023
34.7 840 * 1900 5870 837 246 69.4
2022
34.7 900 1210 2400 8500 1070 390 69.4
2021
89 1000 * 3400 8350 1350 312 69.4
2020
34.7 830 * 2400 3460 825 106 69.4
2019
34.7 760 1110 2700 5990 1100 410 69.4
2018
34.7 920 1200 2500 5200 979 428 69.4
2017
34.7 940 1200 2500 7890 976 420 69.4
2016
34.7 930 1270 2800 6840 1090 424 69.4
2015
34.7 900 1200 2600 7860 1040 418 69.4
2014
27.5 940 1240 2600 9800 1080 398 55
2013
15 930 * 2200 5700 877 431 30
2012
15 560 726 1600 4000 597 463 30
2011
15 530 650 1400 3800 561 441 30
2010
15 440 592 1100 3200 477 428 30
2009
35 500 669 1400 2700 516 520 30
2008
58 1100 1360 2700 7800 1100 503 1
2007
57 770 938 1800 4500 675 471 30
2006
* * * * * * 0 *
2005
* * * * * * 0 *
2004
* * * * * * 0 *
2003
160 890 * 1900 3800 674 86 1
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.
"*" means there was insufficient or no data available to determine the value.