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	Annual Toxics Summary North Long Beach 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	*	*	*	0.15	0.00	8	0.3	*
2003		0.15	0.15	0.45	0.9	2.0	0.44	28	0.3	2
2002		0.6	1.4	1.73	3.0	5.5	1.18	23	0.3	9
2001		0.7	1.7	*	3.5	5.5	1.13	25	0.3	*
2000		0.6	1.8	2.53	5.4	6.0	1.66	28	0.3	13
1999		0.8	1.8	*	5.3	9.1	2.08	20	0.3	*
1998		0.8	2.1	2.73	4.8	7.2	1.70	30	0.3	14
1997		0.8	3.0	*	7.1	11	2.56	25	0.3	*
1996		0.8	2.6	*	4.0	8.6	1.81	20	0.3	*
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.