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	Annual Toxics Summary Chico-East Avenue FAQs Tin nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2023		0.78	0.78	*	0.78	0.78	0.00	20	1.56
2022		0.78	0.78	*	0.78	0.78	0.00	28	1.56
2021		0.78	0.78	*	0.78	2.2	0.34	23	1.56
2020		0.78	*	*	*	2.3	0.57	7	1.56
2019		0.78	0.78	0.95	1.7	1.8	0.36	29	1.56
2018		0.78	0.78	1.45	2.2	7.4	1.30	31	1.56
2017		0.78	0.78	0.95	1.8	2.7	0.54	31	1.56
2016		0.78	0.78	*	0.78	1.6	0.14	32	1.56
2015		0.78	0.78	0.91	0.78	3.7	0.57	30	1.56
2014		1	1	1.32	2.6	3.7	0.74	31	2.0
2013		0.8	0.8	*	0.8	3.2	0.49	28	1.6
2012		1.5	1.5	*	1.5	3.1	0.38	18	3.0
2011		*	*	*	*	*	*	0	*
2010		*	*	*	*	*	*	0	*
2009		*	*	*	*	*	*	0	*
2008		*	*	*	*	*	*	0	*
2007		*	*	*	*	*	*	0	*
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		*	*	*	*	*	*	0	*
2002		*	*	*	*	*	*	0	*
2001		*	*	*	*	*	*	0	*
2000		*	*	*	*	*	*	0	*
1999		*	*	*	*	*	*	0	*
1998		*	*	*	*	*	*	0	*
1997		*	*	*	*	*	*	0	*
1996		*	*	*	*	*	*	0	*
1995		*	*	*	*	*	*	0	*
1994		*	*	*	*	*	*	0	*
1993		*	*	*	*	*	*	0	*
1992		*	*	*	*	*	*	0	*
1991		*	*	*	*	*	*	0	*
1990		*	*	*	*	*	*	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.