California Home	ARB:	Home	Search	Site Map				Contact Us

	Annual Toxics Summary Calexico-Ethel Street FAQs Methyl tertiary-Butyl Ether parts per billion

Read About Estimated Risk

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit	Estimated Risk
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	*	*
2009		*	*	*	*	*	*	0	*	*
2008		*	*	*	*	*	*	0	*	*
2007		*	*	*	*	*	*	0	*	*
2006		*	*	*	*	*	*	0	*	*
2005		*	*	*	*	*	*	0	*	*
2004		0.15	*	*	*	0.5	0.12	8	0.3	*
2003		0.15	0.5	0.98	2.5	3.8	1.02	30	0.3	5
2002		0.15	0.9	2.23	5.3	13	2.80	29	0.3	12
2001		0.4	0.9	1.27	2.4	3.7	0.88	30	0.3	7
2000		0.15	1.1	1.48	3.8	4.8	1.34	31	0.3	8
1999		0.4	1.8	*	5.5	7.6	2.12	26	0.3	*
1998		0.15	1.2	1.78	4.4	5.9	1.61	30	0.3	9
1997		1.5	*	*	*	9.2	2.33	7	0.3	*
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.