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	Annual Toxics Summary Fremont-Chapel Way 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		260	*	*	*	790	223	5	4
2002		170	770	*	1400	1700	411	24	4
2001		170	700	*	1300	1700	393	27	5
2000		130	640	862	1700	2500	642	28	5
1999		180	790	863	1400	3600	658	28	5
1998		300	530	961	1600	6100	1160	25	5
1997		91	530	*	1500	3600	688	28	5
1996		39	460	602	1400	1600	484	30	5
1995		91	600	776	1600	2900	656	30	5
1994		140	630	698	1200	1700	435	29	5
1993		200	510	858	2000	3200	764	29	5
1992		140	600	691	1100	1600	359	31	5
1991		170	820	1070	1700	4300	868	29	5
1990		580	1100	*	2200	3400	782	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.