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	Annual Toxics Summary Fremont-Chapel Way FAQs Methyl Chloroform parts per billion

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2024		*	*	*	*	*	*	0	*
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		0.005	0.01	*	0.01	0.01	0.002	17	0.01
2009		0.005	0.01	0.010	0.01	0.02	0.004	31	0.01
2008		0.01	0.01	0.011	0.01	0.02	0.003	31	0.01
2007		0.01	0.02	0.016	0.02	0.02	0.005	30	0.01
2006		0.02	0.02	0.020	0.02	0.03	0.002	29	0.01
2005		0.02	0.02	*	0.02	0.03	0.003	28	0.01
2004		0.005	0.03	0.027	0.03	0.04	0.007	30	0.01
2003		0.03	0.04	0.036	0.04	0.05	0.006	30	0.01
2002		0.03	0.04	0.042	0.05	0.06	0.006	28	0.01
2001		0.03	0.04	0.043	0.06	0.07	0.009	30	0.01
2000		0.04	0.05	0.064	0.10	0.14	0.026	29	0.01
1999		0.05	0.06	*	0.10	0.13	0.021	16	0.01
1998		0.04	0.05	*	0.10	0.19	0.035	30	0.01
1997		0.05	0.08	*	0.10	0.14	0.024	13	0.01
1996		0.05	0.13	0.651	1.7	4.5	1.15	31	0.01
1995		0.10	0.45	0.597	1.31	2.3	0.540	30	0.01
1994		0.13	1.45	1.80	3.25	9.4	2.17	30	0.01
1993		0.20	1.3	2.29	5.32	16	3.40	29	0.01
1992		0.21	0.82	1.22	2.87	5.7	1.34	30	0.01
1991		0.28	1.8	2.96	6.56	12	2.94	29	0.01
1990		0.32	1.8	2.99	5.92	11	2.90	29	0.01
1989		1.3	5.3	*	9.8	12	2.98	22	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.