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	Annual Toxics Summary North Long Beach FAQs Trichloroethylene 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		0.01	0.01	*	0.02	0.08	0.017	22	0.02	*
2012		0.01	0.01	0.017	0.02	0.09	0.019	29	0.02	0.5
2011		0.01	0.01	0.050	0.08	0.67	0.127	30	0.02	2
2010		0.01	0.01	0.019	0.04	0.05	0.012	26	0.02	0.6
2009		0.01	0.01	0.015	0.03	0.04	0.009	30	0.02	0.5
2008		0.01	0.01	0.020	0.03	0.05	0.012	30	0.02	0.6
2007		0.01	0.02	0.023	0.04	0.06	0.013	29	0.02	0.7
2006		0.02	0.04	0.042	0.06	0.09	0.017	30	0.02	1
2005		0.01	0.02	*	0.10	0.18	0.043	26	0.02	*
2004		0.01	0.01	0.022	0.04	0.08	0.017	31	0.02	0.7
2003		0.01	0.02	0.023	0.05	0.06	0.016	27	0.02	0.7
2002		0.01	0.02	0.021	0.04	0.07	0.015	26	0.02	0.6
2001		0.01	0.01	*	0.04	0.08	0.016	26	0.02	*
2000		0.01	0.03	0.029	0.05	0.06	0.015	28	0.02	0.9
1999		0.01	0.01	*	0.05	0.13	0.030	19	0.02	*
1998		0.01	0.02	0.025	0.06	0.07	0.019	30	0.02	0.8
1997		0.01	0.01	0.032	0.05	0.14	0.026	30	0.02	1
1996		0.01	0.01	*	0.03	0.05	0.010	22	0.02	*
1995		0.01	0.03	0.032	0.05	0.09	0.016	31	0.02	1
1994		0.01	0.01	0.021	0.04	0.08	0.018	29	0.02	0.6
1993		0.01	0.03	0.039	0.06	0.18	0.033	31	0.02	1
1992		0.01	0.05	0.083	0.13	0.49	0.092	30	0.02	3
1991		0.03	0.08	0.082	0.11	0.16	0.030	29	0.02	3
1990		0.04	0.07	0.100	0.13	0.47	0.093	30	0.02	3
1989		0.16	0.39	*	0.79	1.1	0.264	21	0.02	*

	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.