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	Annual Toxics Summary Azusa 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		0.01	0.01	*	0.01	0.01	0.000	22	0.02	*
2021		0.01	0.01	*	0.01	0.01	0.000	24	0.02	*
2020		0.01	*	*	*	0.01	0.000	7	0.02	*
2019		0.01	0.01	0.010	0.01	0.01	0.000	30	0.02	0.3
2018		0.01	0.01	0.011	0.01	0.05	0.007	31	0.02	0.3
2017		0.01	0.01	0.011	0.01	0.05	0.008	29	0.02	0.3
2016		0.01	0.01	0.021	0.04	0.10	0.020	30	0.02	0.6
2015		0.01	0.01	0.015	0.03	0.04	0.010	30	0.02	0.5
2014		0.01	0.01	0.084	0.02	2.6	0.472	30	0.02	3
2013		0.01	0.01	0.011	0.01	0.03	0.004	31	0.02	0.3
2012		0.01	0.01	0.011	0.01	0.03	0.003	30	0.02	0.3
2011		0.01	0.01	0.025	0.07	0.08	0.021	30	0.02	0.8
2010		0.01	0.02	0.024	0.04	0.06	0.016	24	0.02	0.7
2009		0.01	0.01	0.022	0.06	0.08	0.022	31	0.02	0.7
2008		0.01	0.01	*	0.03	0.10	0.018	28	0.02	*
2007		0.01	0.02	0.028	0.05	0.08	0.020	27	0.02	0.9
2006		0.01	0.03	0.032	0.05	0.10	0.020	29	0.02	1
2005		0.01	0.03	0.055	0.09	0.32	0.062	29	0.02	2
2004		0.01	0.03	0.039	0.08	0.15	0.033	29	0.02	1
2003		0.01	0.05	0.057	0.11	0.20	0.041	28	0.02	2
2002		0.01	0.05	0.051	0.09	0.21	0.040	28	0.02	2
2001		0.01	0.04	*	0.09	0.36	0.068	26	0.02	*
2000		0.01	0.04	0.051	0.10	0.17	0.041	30	0.02	2
1999		0.08	*	*	*	0.08	0.131	1	0.02	*
1998		*	*	*	*	*	*	0	*	*
1997		*	*	*	*	*	*	0	*	*
1996		*	*	*	*	*	*	0	*	*
1995		*	*	*	*	*	*	0	*	*
1994		*	*	*	*	*	*	0	*	*
1993		*	*	*	*	*	*	0	*	*
1992		*	*	*	*	*	*	0	*	*
1991		*	*	*	*	*	*	0	*	*
1990		*	*	*	*	*	*	0	*	*
1989		0.14	*	*	*	0.52	0.131	8	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.