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	Annual Toxics Summary North Long Beach FAQs Benzene 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
2022		*	*	*	*	*	*	0	*	*
2021		*	*	*	*	*	*	0	*	*
2020		*	*	*	*	*	*	0	*	*
2019		*	*	*	*	*	*	0	*	*
2018		*	*	*	*	*	*	0	*	*
2017		*	*	*	*	*	*	0	*	*
2016		*	*	*	*	*	*	0	*	*
2015		*	*	*	*	*	*	0	*	*
2014		*	*	*	*	*	*	0	*	*
2013		0.13	0.22	*	0.55	0.82	0.19	22	0.05	*
2012		0.12	0.32	0.402	0.68	1.0	0.211	29	0.05	105
2011		0.12	0.34	0.444	0.91	1.2	0.306	30	0.05	115
2010		0.15	0.24	0.381	0.66	1.3	0.269	26	0.05	99
2009		0.11	0.29	0.418	0.79	1.0	0.273	29	0.05	109
2008		0.15	0.31	0.445	0.85	1.5	0.318	30	0.05	116
2007		0.12	0.31	0.414	0.8	1.3	0.311	29	0.05	108
2006		0.15	0.33	0.484	0.83	1.8	0.365	30	0.05	126
2005		0.16	0.5	*	1.1	1.6	0.412	26	0.05	*
2004		0.19	0.53	0.554	0.91	1.5	0.307	31	0.05	144
2003		0.29	0.55	0.705	1.24	1.5	0.365	27	0.05	183
2002		0.21	0.57	0.705	1.25	2.1	0.45	26	0.05	184
2001		0.27	0.54	*	1.7	3.1	0.66	26	0.05	*
2000		0.3	0.7	1.00	1.9	2.7	0.65	28	0.2	259
1999		0.2	0.7	1.11	1.8	3.9	0.82	24	0.2	290
1998		0.5	0.9	1.16	2.1	2.9	0.68	30	0.2	303
1997		0.1	0.9	1.24	2.3	3.5	0.82	31	0.2	322
1996		0.25	1.0	*	2.4	4.1	1.01	22	0.5	*
1995		0.25	1.3	1.69	3.7	4.6	1.10	31	0.5	441
1994		0.25	1.8	2.04	3.6	6.0	1.19	29	0.5	530
1993		0.25	1.4	1.99	4.0	5.0	1.16	32	0.5	519
1992		0.8	2.0	2.60	4.9	6.5	1.50	30	0.5	677
1991		0.8	2.3	2.45	4.6	6.7	1.47	29	0.5	638
1990		1.4	2.8	3.53	6.5	9.2	2.05	31	0.5	920
1989		2.0	2.6	*	8.6	9.6	2.67	21	0.5	*

	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.