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Strontium
nanograms per cubic meter
Year Months
Present
Minimum Median Mean 90th
Percentile
Maximum Standard
Deviation
Number of
Observations
Detection
Limit
2023
* * * * * * 0 *
2022
* * * * * * 0 *
2021
* * * * * * 0 *
2020
* * * * * * 0 *
2019
* * * * * * 0 *
2018
* * * * * * 0 *
2017
* * * * * * 0 *
2016
* * * * * * 0 *
2015
* * * * * * 0 *
2014
* * * * * * 0 *
2013
* * * * * * 0 *
2012
* * * * * * 0 *
2011
0.75 3.7 * 9.9 16 4.10 27 1.5
2010
0.75 4.3 5.25 8.2 20 3.82 29 1.5
2009
0.75 4.8 5.41 9.7 13 3.09 33 1.5
2008
* * * * * * 0 *
2007
1.8 7.0 * 18.4 25 5.86 22 1.5
2006
* * * * * * 0 *
2005
* * * * * * 0 *
2004
* * * * * * 0 *
2003
3.0 * * * 9.0 2.06 7 1.0
2002
3.0 11 11.2 17 23 4.44 29 1.0
2001
1 8.0 10.0 18.6 32 6.59 32 2.0
2000
2.0 10 9.93 15.2 21 4.83 29 2.0
1999
1 11 * 19.6 34 7.51 25 2.0
1998
1 8.5 9.68 21.5 26 7.37 26 2.0
1997
1 8.0 11.3 20.3 87 15.7 30 2.0
1996
1 6.0 7.65 18.6 21 6.91 29 2.0
1995
1 7.0 10.6 20 32 8.17 31 2.0
1994
1 8.0 * 16.6 41 8.32 25 2.0
1993
1 11 11.3 22.6 35 8.33 29 2.0
1992
2.0 8.0 10.8 22 28 6.66 31 2.0
1991
1 13 * 23.4 36 8.91 25 2.0
1990
7.0 16 * 29.5 32 7.77 16 2.0
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.