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California Air Resources Board

Annual Toxics Summary
ARB's ADAM Air Quality Database
Concord-2975 Treat Blvd FAQs
Phosphorus
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 *
2009
* * * * * * 0 *
2008
* * * * * * 0 *
2007
* * * * * * 0 *
2006
* * * * * * 0 *
2005
* * * * * * 0 *
2004
* * * * * * 0 *
2003
* * * * * * 0 *
2002
* * * * * * 0 *
2001
* * * * * * 0 *
2000
16 * * * 43 11.8 4 15
1999
16 36 39.3 61 120 24.0 27 15
1998
7.5 31 * 49 75 14.5 19 15
1997
7.5 25 * 48 73 17.0 22 15
1996
7.5 18 20.5 50 66 18.7 26 15
1995
7.5 7.5 19.3 41 82 19.2 27 15
1994
7.5 7.5 * 21 51 11.3 16 15
1993
* * * * * * 0 *
1992
1 1 * 22 30 9.8 13 2
1991
1 4 8.8 25 36 10.5 27 2
1990
1 11 * 28 32 10.0 16 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.