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	Annual Toxics Summary San Jose-4th Street FAQs Iron 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		*	*	*	*	*	*	0	*
2002		710	*	*	*	1600	306	10	2
2001		240	910	1160	1900	3300	753	30	2
2000		180	900	1070	1600	3600	672	28	2
1999		420	870	1040	1500	3500	599	30	2
1998		280	700	915	1800	2900	652	29	2
1997		160	780	912	1500	1800	467	30	2
1996		130	870	806	1400	1500	412	28	2
1995		83	850	988	1900	3000	786	30	2
1994		130	940	991	1600	2800	578	31	2
1993		220	1100	1140	2000	3300	661	29	2
1992		260	1100	1150	1800	3600	642	30	2
1991		260	970	1260	2400	3800	826	28	2
1990		500	1300	*	1600	3300	612	15	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.