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	Annual Toxics Summary North Long Beach FAQs Methylene Chloride 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
2024		*	*	*	*	*	*	0	*	*
2023		*	*	*	*	*	*	0	*	*
2022		*	*	*	*	*	*	0	*	*
2021		*	*	*	*	*	*	0	*	*
2020		*	*	*	*	*	*	0	*	*
2019		*	*	*	*	*	*	0	*	*
2018		*	*	*	*	*	*	0	*	*
2017		*	*	*	*	*	*	0	*	*
2016		*	*	*	*	*	*	0	*	*
2015		*	*	*	*	*	*	0	*	*
2014		*	*	*	*	*	*	0	*	*
2013		0.05	0.15	*	0.3	2.6	0.529	22	0.1	*
2012		0.05	0.15	0.186	0.31	0.4	0.086	29	0.1	2
2011		0.05	0.21	0.25	0.53	1.1	0.223	30	0.1	2
2010		0.05	0.19	1.47	0.42	15	2.90	26	0.1	15
2009		0.05	0.21	0.241	0.56	0.74	0.204	30	0.1	2
2008		0.05	0.19	0.235	0.39	0.83	0.191	30	0.1	2
2007		0.05	0.13	0.204	0.39	0.56	0.141	29	0.1	2
2006		0.05	0.16	0.212	0.39	1.1	0.20	30	0.1	2
2005		0.05	0.17	*	1.36	2.4	0.665	25	0.1	*
2004		0.05	0.22	0.239	0.4	0.79	0.153	31	0.1	2
2003		0.05	0.29	0.307	0.52	0.76	0.166	27	0.1	3
2002		0.05	0.23	0.269	0.58	0.92	0.227	26	0.1	3
2001		0.5	0.2	*	0.49	1.2	0.24	26	0.1	*
2000		0.5	0.5	0.65	0.5	3.4	0.58	28	1.0	6
1999		0.5	0.5	*	1.1	1.5	0.33	18	1.0	*
1998		0.5	0.5	0.60	0.5	1.5	0.26	29	1.0	6
1997		0.5	0.5	0.74	1.4	1.9	0.45	30	1.0	7
1996		0.5	0.5	*	1.0	1.9	0.42	22	1.0	*
1995		0.5	0.5	0.98	2.3	2.4	0.67	31	1.0	10
1994		0.5	0.5	0.84	1.5	3.4	0.65	30	1.0	8
1993		0.5	0.5	1.15	2.5	3.9	0.94	32	1.0	11
1992		0.5	0.5	1.00	1.9	5.5	1.11	30	1.0	10
1991		0.5	0.5	0.88	1.7	2.5	0.60	29	1.0	9
1990		0.5	1.6	2.05	4.2	7.4	1.68	27	1.0	20
1989		0.5	1.3	*	3.8	5.2	1.52	21	1.0	*

	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.