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	Annual Toxics Summary Mexicali-Calzada Benito Juarez FAQs Methyl Ethyl Ketone 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		0.05	*	*	*	0.05	0.05	1	0.1
2010		0.05	*	*	*	0.2	0.05	8	0.1
2009		0.5	*	*	*	0.5	0.09	1	0.1
2008		0.05	*	*	*	0.2	0.09	3	0.1
2007		0.05	*	*	*	0.05	0.05	1	0.1
2006		0.05	*	*	*	0.2	0.05	9	0.1
2005		0.05	0.05	*	0.2	0.4	0.10	17	0.1
2004		0.05	*	*	*	0.4	0.14	6	0.1
2003		*	*	*	*	*	*	0	*
2002		*	*	*	*	*	*	0	*
2001		*	*	*	*	*	*	0	*
2000		0.05	0.2	*	0.5	0.6	0.19	18	0.1
1999		0.05	0.2	0.39	0.8	1.6	0.40	29	0.1
1998		0.05	0.4	*	0.8	1.0	0.30	25	0.1
1997		1.2	*	*	*	1.4	0.14	2	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.