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	Annual Toxics Summary Mexicali-Calzada Benito Juarez FAQs Styrene parts per billion

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	*
2010		0.5	*	*	*	2.6	1.00	4	0.1
2009		0.05	*	*	*	2.1	0.62	9	0.1
2008		0.05	*	*	*	0.05	0.41	1	0.1
2007		0.05	*	*	*	0.9	0.41	3	0.1
2006		0.05	0.4	*	2.1	2.3	0.79	16	0.1
2005		0.05	0.3	*	1.3	1.6	0.50	17	0.1
2004		0.05	*	*	*	3.7	1.09	10	0.1
2003		0.05	0.2	*	0.5	0.7	0.20	17	0.1
2002		0.05	0.3	*	1.1	1.5	0.45	19	0.1
2001		0.05	0.2	*	0.6	1.1	0.31	24	0.1
2000		0.1	0.4	*	0.8	0.9	0.28	16	0.1
1999		0.1	*	*	*	1.6	0.54	10	0.1
1998		0.05	0.1	*	1.8	2.1	0.74	15	0.1
1997		0.05	0.2	*	1.9	2.6	0.85	15	0.1
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.