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	Annual Toxics Summary Modesto-14th Street FAQs Methyl Chloroform parts per billion

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
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	*
2001		*	*	*	*	*	*	0	*
2000		*	*	*	*	*	*	0	*
1999		0.04	0.05	*	0.08	0.14	0.028	11	0.01
1998		0.04	0.06	*	0.11	0.22	0.042	27	0.01
1997		0.005	0.11	0.157	0.21	0.87	0.154	29	0.01
1996		0.06	0.10	0.150	0.18	0.90	0.148	31	0.01
1995		0.11	0.17	0.209	0.34	0.91	0.152	30	0.01
1994		0.06	0.17	0.207	0.32	0.81	0.176	31	0.01
1993		0.16	0.25	0.319	0.49	0.67	0.149	29	0.01
1992		0.26	0.44	0.585	0.95	3.5	0.602	31	0.01
1991		0.31	0.50	0.553	0.93	1.3	0.235	30	0.01
1990		0.18	0.55	1.41	1.2	19	3.32	31	0.01
1989		0.22	1.0	1.52	2.52	8.6	1.84	24	0.01

	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.