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	Annual Toxics Summary Fresno-1st 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		0.01	*	*	*	0.01	0.004	1	0.01
2011		0.005	0.005	0.008	0.01	0.02	0.004	30	0.01
2010		0.005	0.01	0.008	0.01	0.01	0.003	30	0.01
2009		0.005	0.01	0.010	0.01	0.02	0.003	32	0.01
2008		0.01	0.01	0.012	0.02	0.02	0.004	31	0.01
2007		0.01	0.01	0.014	0.02	0.02	0.005	29	0.01
2006		0.01	0.02	0.020	0.02	0.02	0.002	31	0.01
2005		0.02	0.02	0.020	0.02	0.03	0.002	34	0.01
2004		0.02	0.02	0.025	0.03	0.03	0.005	30	0.01
2003		0.02	0.03	0.034	0.04	0.06	0.008	31	0.01
2002		0.03	0.04	0.039	0.04	0.05	0.005	31	0.01
2001		0.02	0.04	0.055	0.05	0.59	0.101	30	0.01
2000		0.04	0.05	0.068	0.12	0.20	0.038	30	0.01
1999		0.05	0.05	*	0.06	0.10	0.014	12	0.01
1998		0.04	0.06	*	0.11	0.15	0.029	15	0.01
1997		0.05	0.08	0.078	0.09	0.17	0.023	29	0.01
1996		0.07	0.09	0.095	0.13	0.18	0.029	31	0.01
1995		0.10	0.14	0.157	0.22	0.34	0.058	30	0.01
1994		0.05	0.17	0.871	0.88	16	2.95	31	0.01
1993		0.13	0.37	0.830	1.86	5.4	1.15	29	0.01
1992		0.26	0.50	0.531	0.71	2.0	0.308	30	0.01
1991		0.23	0.48	0.620	1.02	2.8	0.493	30	0.01
1990		0.21	0.40	*	0.93	2.4	0.461	24	0.01
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.