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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 *
2010
0.75 2.5 * 4.1 6.1 1.47 17 1.5
2009
0.75 3.2 3.75 6.7 7.9 2.01 31 1.5
2008
* * * * * * 0 *
2007
0.75 3.8 * 6.9 23 5.01 22 1.5
2006
* * * * * * 0 *
2005
* * * * * * 0 *
2004
* * * * * * 0 *
2003
2.0 * * * 5.0 1.30 5 1.0
2002
3.0 7.0 * 9.0 13 2.55 24 1.0
2001
1 6.0 * 9.0 11 2.54 27 2.0
2000
1 5.0 5.96 11 14 3.44 28 2.0
1999
1 6.5 7.49 11 40 7.38 28 2.0
1998
1 6.0 8.53 15.4 27 6.33 25 2.0
1997
1 4.0 * 9.0 12 2.89 28 2.0
1996
1 5.5 6.64 16.1 23 5.61 30 2.0
1995
1 4.0 4.54 9.0 14 3.79 30 2.0
1994
1 5.0 4.59 9.2 10 3.18 29 2.0
1993
2.0 4.0 6.08 11.4 18 4.08 29 2.0
1992
1 4.0 5.10 9.0 12 2.93 31 2.0
1991
1 5.0 6.15 12 24 4.72 29 2.0
1990
3.0 7.0 * 14 14 4.11 15 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.