California Home	ARB:	Home	Search	Site Map				Contact Us

	Annual Toxics Summary Concord-2975 Treat Blvd FAQs Strontium nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2024		*	*	*	*	*	*	0	*
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		1	*	*	*	9.0	3.77	4	2.0
1999		1	4.0	4.58	7.4	15	3.46	27	2.0
1998		1	5.0	*	6.0	6.0	1.36	19	2.0
1997		1	4.0	*	5.0	12	2.24	22	2.0
1996		1	3.0	3.36	7.5	10	2.53	26	2.0
1995		1	3.0	3.04	6.0	8.0	2.19	27	2.0
1994		1	3.0	3.99	7.4	28	5.21	29	2.0
1993		1	4.0	4.64	7.4	12	2.60	27	2.0
1992		1	3.0	*	6.0	9.0	2.17	22	2.0
1991		1	4.0	5.54	9.2	16	3.65	27	2.0
1990		1	5.0	*	6.5	7.0	1.86	16	2.0
1989		*	*	*	*	*	*	0	*

	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.