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	Annual Toxics Summary Los Angeles-North Main Street FAQs Sulfur 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		210	930	*	1500	1600	421	25	51
2012		320	820	*	1700	2200	544	23	60
2011		450	760	*	2100	3100	834	14	60
2010		270	800	*	1500	2000	497	16	60
2009		250	1100	1120	2300	2700	761	30	60
2008		170	950	1100	1700	2500	591	28	20
2007		120	1500	*	2800	3600	1050	22	60
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		420	*	*	*	1200	304	5	2
2002		340	890	1130	2100	2800	662	29	2
2001		160	980	*	2200	2500	737	22	2
2000		250	930	1050	2200	2700	753	31	2
1999		280	850	1120	1900	5600	1030	30	2
1998		6	1300	*	2300	2900	860	26	2
1997		250	1000	*	2400	2400	820	17	2
1996		130	1200	1090	2100	2800	735	29	2
1995		140	1200	1080	1800	2600	627	28	2
1994		84	990	1330	2900	4400	1110	28	2
1993		260	920	*	2500	2800	774	23	2
1992		39	1600	*	2400	3800	935	21	2
1991		290	1500	1560	2600	3400	946	28	2
1990		340	1300	*	2500	3200	864	17	2
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.