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	Annual Toxics Summary San Jose-4th Street 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	*	*
2012		*	*	*	*	*	*	0	*	*
2011		*	*	*	*	*	*	0	*	*
2010		*	*	*	*	*	*	0	*	*
2009		*	*	*	*	*	*	0	*	*
2008		*	*	*	*	*	*	0	*	*
2007		*	*	*	*	*	*	0	*	*
2006		*	*	*	*	*	*	0	*	*
2005		*	*	*	*	*	*	0	*	*
2004		*	*	*	*	*	*	0	*	*
2003		*	*	*	*	*	*	0	*	*
2002		0.01	*	*	*	0.03	0.009	9	0.02	*
2001		0.01	0.03	*	0.05	0.09	0.020	28	0.02	*
2000		0.01	0.01	0.018	0.04	0.08	0.016	29	0.02	0.5
1999		0.01	0.01	*	0.04	0.05	0.013	23	0.02	*
1998		0.01	0.01	*	0.04	0.05	0.013	29	0.02	*
1997		0.01	0.01	0.018	0.03	0.12	0.022	27	0.02	0.6
1996		0.01	0.01	0.022	0.02	0.33	0.058	31	0.02	0.7
1995		0.01	0.01	0.017	0.03	0.03	0.009	30	0.02	0.5
1994		0.01	0.01	0.013	0.03	0.05	0.011	31	0.02	0.4
1993		0.01	0.01	0.013	0.02	0.04	0.007	30	0.02	0.4
1992		0.01	0.03	0.028	0.04	0.18	0.030	31	0.02	0.9
1991		0.03	0.06	*	0.08	0.12	0.023	27	0.02	*
1990		0.02	0.04	0.051	0.08	0.19	0.035	27	0.02	2
1989		0.06	0.08	0.091	0.13	0.16	0.029	23	0.02	3

	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.