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	Annual Toxics Summary Chula Vista FAQs Methyl Bromide parts per billion

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2023		0.015	0.015	*	0.015	0.04	0.005	21	0.03
2022		0.015	0.015	0.015	0.015	0.015	0.000	30	0.03
2021		0.015	0.015	*	0.015	0.015	0.000	23	0.03
2020		0.015	*	*	*	0.015	0.000	9	0.03
2019		0.015	0.015	0.015	0.015	0.015	0.000	29	0.03
2018		0.015	0.015	0.015	0.015	0.015	0.000	31	0.03
2017		0.015	0.015	0.015	0.015	0.015	0.000	28	0.03
2016		0.015	0.015	0.017	0.015	0.05	0.008	29	0.03
2015		0.015	0.015	0.019	0.04	0.05	0.010	31	0.03
2014		0.015	0.015	0.018	0.015	0.05	0.009	28	0.03
2013		0.015	0.015	0.016	0.015	0.03	0.003	30	0.03
2012		0.015	0.015	0.019	0.04	0.06	0.011	30	0.03
2011		0.015	0.015	0.015	0.015	0.015	0.000	31	0.03
2010		0.015	0.015	0.015	0.015	0.015	0.000	30	0.03
2009		0.015	0.015	0.016	0.015	0.05	0.006	32	0.03
2008		0.015	0.015	0.017	0.015	0.04	0.006	30	0.03
2007		0.015	0.015	0.016	0.015	0.04	0.005	31	0.03
2006		0.015	0.015	*	0.015	0.015	0.000	26	0.03
2005		0.015	0.015	0.019	0.04	0.06	0.012	29	0.03
2004		0.015	0.015	0.021	0.03	0.09	0.017	31	0.03
2003		0.015	0.015	*	0.04	0.05	0.012	28	0.03
2002		0.015	0.015	0.021	0.05	0.06	0.013	29	0.03
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.