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	Annual Toxics Summary Upland-San Bernardino Road FAQs Methyl Chloroform parts per billion

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2025		*	*	*	*	*	*	0	*
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	*
2009		*	*	*	*	*	*	0	*
2008		*	*	*	*	*	*	0	*
2007		*	*	*	*	*	*	0	*
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		*	*	*	*	*	*	0	*
2002		*	*	*	*	*	*	0	*
2001		*	*	*	*	*	*	0	*
2000		*	*	*	*	*	*	0	*
1999		*	*	*	*	*	*	0	*
1998		*	*	*	*	*	*	0	*
1997		0.07	1.02	0.899	1.41	2.5	0.616	30	0.01
1996		0.07	0.21	0.258	0.47	0.81	0.190	28	0.01
1995		0.12	0.49	0.590	1.1	1.3	0.360	31	0.01
1994		0.15	0.77	0.747	1.1	2.7	0.483	31	0.01
1993		0.20	0.99	1.52	2.82	9.8	1.87	29	0.01
1992		0.31	1.5	2.09	3.64	10	1.94	27	0.01
1991		0.72	1.9	2.21	4.26	6.8	1.57	27	0.01
1990		0.41	1.2	1.61	2.08	9.5	1.67	27	0.01
1989		0.66	2.05	*	4.62	8.3	1.72	20	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.