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	Annual Statewide Toxics Summary Aluminum FAQs nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
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		120	830	*	2000	5800	1070	86	4
2002		2	1600	1980	4300	8300	1490	491	4
2001		43	1300	1760	3900	7700	1430	505	5
2000		36	1400	1790	4000	8700	1490	472	5
1999		59	1200	1790	4000	10000	1620	565	5
1998		18	960	1390	3300	10000	1430	561	5
1997		31	1100	1480	3100	10000	1420	557	5
1996		17	980	1370	3100	8300	1310	595	5
1995		38	1200	1650	3600	9500	1620	602	5
1994		45	1200	1530	3300	6500	1270	585	5
1993		35	1200	1640	3700	10000	1560	575	5
1992		14	1300	1730	3800	16000	1600	554	5
1991		66	1500	2100	4500	25000	2080	567	5
1990		170	2200	*	5700	11000	2120	309	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.