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	Annual Toxics Summary Fresno-1st Street FAQs Silicon nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
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		480	*	*	*	3000	863	7	2
2002		790	5900	6070	11000	13000	3430	29	2
2001		370	5500	5840	12000	19000	4450	32	3
2000		630	4900	5310	8900	14000	3540	29	3
1999		260	6200	*	13000	26000	5920	25	3
1998		280	3100	4480	11000	15000	4330	26	3
1997		240	5400	6280	13000	21000	5160	29	3
1996		160	2300	4500	12000	14000	4540	29	3
1995		540	4600	5840	14000	16000	5190	31	3
1994		610	6000	*	11000	13000	3950	25	3
1993		570	6500	6940	15000	24000	5760	29	3
1992		1300	6200	7170	15000	17000	4590	31	3
1991		780	6600	*	14000	18000	5440	25	3
1990		3600	14000	*	21000	23000	5530	16	3
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.