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	Annual Toxics Summary San Jose-4th Street FAQs Aluminum 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		670	*	*	*	1500	290	10	5
2001		260	1200	1450	2300	4500	959	30	5
2000		160	1100	1240	1800	3700	708	28	5
1999		460	1100	1220	1700	4300	717	30	5
1998		280	840	1020	1900	3500	726	29	5
1997		130	870	998	1600	2700	554	30	5
1996		130	890	876	1500	1900	505	28	5
1995		92	1000	1170	2400	4000	967	30	5
1994		110	1000	1120	2000	2800	636	31	5
1993		170	1300	1330	2200	4000	816	29	5
1992		340	1300	1390	2200	4200	757	30	5
1991		430	1200	1700	2900	5500	1130	28	5
1990		730	1700	*	2300	5000	939	15	5
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.