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	Annual Toxics Summary Los Angeles-North Main Street FAQs Barium 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		24	*	*	*	95	30.5	5	19
2002		40	78	93.5	150	210	44.7	29	19
2001		12.5	69	*	130	190	47.6	22	25
2000		12.5	66	68.2	110	140	33.3	31	25
1999		12.5	68	110	190	1400	246	30	25
1998		12.5	63	*	83	120	29.3	26	25
1997		12.5	60	*	99	230	49.8	17	25
1996		12.5	61	57.6	92	190	36.8	29	25
1995		12.5	55	63.6	110	170	41.2	28	25
1994		12.5	66	72.1	130	180	43.0	28	25
1993		12.5	55	*	120	160	42.7	23	25
1992		12.5	69	*	180	430	92.2	21	25
1991		12.5	52	56.2	120	160	43.3	28	25
1990		12.5	44	*	170	540	128	17	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.