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	Annual Toxics Summary Chula Vista FAQs Tin nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2025		0.78	0.78	*	7.5	10.7	3.23	12	1.56
2024		0.78	0.78	2.63	5.8	28.4	5.17	30	1.56
2023		0.78	1.6	2.99	4.8	21.4	4.96	31	1.56
2022		0.78	0.78	3.24	5.0	24.1	5.28	31	1.56
2021		0.78	0.78	*	6.1	16	4.27	23	1.56
2020		0.78	*	*	*	29.2	11.2	8	1.56
2019		0.78	1.7	3.07	6.0	14.3	3.38	30	1.56
2018		0.78	2.4	3.53	6.9	15.8	3.92	31	1.56
2017		0.78	0.78	4.11	8.8	56.2	10.2	30	1.56
2016		0.78	2.5	*	13.8	37.7	7.88	27	1.56
2015		0.78	0.78	2.28	5.4	8.1	2.21	30	1.56
2014		1	1	3.14	9.5	25	4.88	31	2.0
2013		0.8	0.8	*	7.9	12	3.25	28	1.6
2012		1.5	1.5	4.62	7.9	31	5.88	29	3.0
2011		1.5	*	*	*	1.5	0.00	4	3.0
2010		1.5	1.5	2.33	4.0	10	1.86	28	3.0
2009		1.5	1.5	2.17	3.7	9.8	1.87	30	3.0
2008		*	*	*	*	*	*	0	*
2007		0.75	0.75	*	3.2	3.8	1.07	16	1.5
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		2.5	*	*	*	2.5	0.00	5	5.0
2002		2	2	5.69	9.3	26	5.66	30	4.0
2001		2	2	4.07	7.3	12	2.73	28	4.0
2000		2	2	*	2	2	0.00	11	4.0
1999		2	2	*	2	14	2.91	17	4.0
1998		2	2	2.17	2	8.0	1.15	27	4.0
1997		2	2	2.22	2	10	1.49	29	4.0
1996		2	2	2.17	2	8.0	1.10	30	4.0
1995		2	2	2.63	4.2	9.0	1.76	29	4.0
1994		2	2	2.94	5.1	11	2.02	30	4.0
1993		2	2	2.75	5.0	8.0	1.45	27	4.0
1992		2	*	*	*	14	4.19	9	4.0
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.