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Iron
nanograms per cubic meter
Year Months
Present
Minimum Median Mean 90th
Percentile
Maximum Standard
Deviation
Number of
Observations
Detection
Limit
2017
129 690 888 1800 3320 717 30 69.4
2016
84 680 719 1100 1670 360 31 69.4
2015
200 710 808 1400 1650 401 30 69.4
2014
120 670 788 1200 2300 472 29 55
2013
120 610 * 1300 1800 469 29 30
2012
65 320 419 900 1000 277 30 30
2011
77 350 391 830 1000 275 27 30
2010
56 320 443 860 1100 262 29 30
2009
75 290 337 730 840 220 29 30
2008
74 490 624 960 1900 407 27 1
2007
190 490 561 1100 1400 345 29 30
2006
* * * * * * 0 *
2005
* * * * * * 0 *
2004
* * * * * * 0 *
2003
400 * * * 1800 497 5 1
2002
410 * * * 1400 448 6 1
2001
* * * * * * 0 *
2000
* * * * * * 0 *
1999
* * * * * * 0 *
1998
* * * * * * 0 *
1997
* * * * * * 0 *
1996
* * * * * * 0 *
1995
* * * * * * 0 *
1994
* * * * * * 0 *
1993
* * * * * * 0 *
1992
* * * * * * 0 *
1991
* * * * * * 0 *
1990
* * * * * * 0 *
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.