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	Annual Toxics Summary San Francisco-Arkansas 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		170	520	*	800	1300	229	28	51
2012		30	450	459	760	1300	281	29	60
2011		30	530	*	850	1300	294	24	60
2010		130	460	*	790	2300	418	28	60
2009		110	490	644	1100	2600	522	31	60
2008		250	570	656	1100	1100	282	31	20
2007		230	650	*	1200	1300	310	22	60
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		330	*	*	*	1600	470	6	2
2002		170	720	776	1400	1500	335	30	2
2001		220	600	609	930	1200	250	31	2
2000		410	560	*	850	1100	187	19	2
1999		120	780	*	1400	1700	395	20	2
1998		210	570	604	920	1200	245	26	2
1997		180	560	607	900	1300	238	28	2
1996		180	550	700	1000	1300	276	26	2
1995		170	730	724	1100	2400	430	30	2
1994		200	700	733	1200	1500	353	30	2
1993		250	660	711	1100	1500	317	27	2
1992		450	800	*	1400	3100	634	16	2
1991		230	870	*	1400	1700	410	25	2
1990		160	870	*	1100	1300	264	14	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.