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

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
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		0.75	0.75	0.86	0.75	2.5	0.39	30	1.5
2010		0.75	0.75	0.77	0.75	1.6	0.16	29	1.5
2009		0.75	0.75	0.80	0.75	2.7	0.34	33	1.5
2008		*	*	*	*	*	*	0	*
2007		0.75	0.75	*	0.75	26	7.27	23	1.5
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		1	*	*	*	5.0	1.57	7	2.0
2002		1	1	1.58	3.0	4.0	1.02	29	2.0
2001		1	1	1.50	3.0	5.0	1.05	32	2.0
2000		1	1	1.53	3.0	5.0	1.06	29	2.0
1999		1	1	*	2.6	5.0	1.05	25	2.0
1998		1	1	1.36	3.0	3.0	0.80	26	2.0
1997		1	1	2.06	4.0	11	2.00	30	2.0
1996		1	2.0	2.72	4.0	12	2.70	29	2.0
1995		1	1	1.17	2.0	3.0	0.54	31	2.0
1994		1	1	*	3.0	5.0	1.22	25	2.0
1993		1	1	1.13	1	3.0	0.41	29	2.0
1992		1	1	1.76	3.0	12	2.44	31	2.0
1991		1	1	*	1	1	0.00	25	2.0
1990		1	1	*	1	1	0.00	16	2.0
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.