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	Annual Toxics Summary San Francisco-Arkansas Street FAQs Barium nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2025		*	*	*	*	*	*	0	*
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		33	*	*	*	73	15.8	6	19
2002		9.5	27	33.2	66	91	24.2	30	19
2001		12.5	29	33.1	68	110	26.5	31	25
2000		12.5	34	*	90	110	29.7	19	25
1999		12.5	31	*	50	75	17.5	20	25
1998		12.5	12.5	27.8	56	120	25.2	26	25
1997		12.5	12.5	27.0	58	78	21.6	28	25
1996		12.5	12.5	29.5	54	88	21.1	26	25
1995		12.5	12.5	30.6	66	88	24.9	30	25
1994		12.5	12.5	28.3	59	110	23.4	30	25
1993		12.5	27	35.4	75	93	25.7	27	25
1992		12.5	12.5	*	43	52	14.3	16	25
1991		12.5	12.5	*	36	86	16.8	25	25
1990		12.5	12.5	*	25	38	8.1	14	25
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.