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	Annual Toxics Summary San Jose-Jackson Street FAQs Methyl Chloroform parts per billion

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2025		0.005	0.005	*	0.005	0.005	0.000	20	0.01
2024		0.005	0.005	0.005	0.005	0.005	0.000	29	0.01
2023		0.005	0.005	0.005	0.005	0.005	0.000	30	0.01
2022		0.005	0.005	0.005	0.005	0.005	0.000	30	0.01
2021		0.005	0.005	*	0.005	0.005	0.000	22	0.01
2020		0.005	*	*	*	0.005	0.000	9	0.01
2019		0.005	0.005	0.005	0.005	0.005	0.000	30	0.01
2018		0.005	0.005	0.005	0.005	0.005	0.000	31	0.01
2017		0.005	0.005	0.005	0.005	0.005	0.000	27	0.01
2016		0.005	0.005	0.007	0.005	0.03	0.006	31	0.01
2015		0.005	0.005	0.005	0.005	0.02	0.002	30	0.01
2014		0.005	0.005	*	0.005	0.02	0.003	27	0.01
2013		0.005	0.005	0.007	0.01	0.01	0.003	31	0.01
2012		0.005	0.005	0.007	0.02	0.02	0.004	29	0.01
2011		0.005	0.01	0.010	0.02	0.02	0.004	32	0.01
2010		0.005	0.01	0.011	0.02	0.02	0.006	30	0.01
2009		0.01	0.01	0.014	0.02	0.03	0.006	31	0.01
2008		0.01	0.01	0.013	0.02	0.03	0.005	31	0.01
2007		0.01	0.02	0.023	0.02	0.17	0.028	30	0.01
2006		0.02	0.02	0.033	0.04	0.14	0.027	30	0.01
2005		0.02	0.03	0.027	0.03	0.07	0.010	31	0.01
2004		0.02	0.03	0.033	0.04	0.05	0.007	30	0.01
2003		0.03	0.04	0.040	0.05	0.06	0.008	31	0.01
2002		0.03	*	*	*	0.07	0.014	6	0.01
2001		*	*	*	*	*	*	0	*
2000		*	*	*	*	*	*	0	*
1999		*	*	*	*	*	*	0	*
1998		*	*	*	*	*	*	0	*
1997		*	*	*	*	*	*	0	*
1996		*	*	*	*	*	*	0	*
1995		*	*	*	*	*	*	0	*
1994		*	*	*	*	*	*	0	*
1993		*	*	*	*	*	*	0	*
1992		*	*	*	*	*	*	0	*
1991		*	*	*	*	*	*	0	*
1990		*	*	*	*	*	*	0	*
1989		*	*	*	*	*	*	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.