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	Annual Toxics Summary Riverside-Rubidoux FAQs Methyl Chloroform parts per billion

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2023		0.005	0.005	*	0.005	0.005	0.000	20	0.01
2022		0.005	0.005	0.005	0.005	0.005	0.000	29	0.01
2021		0.005	0.005	*	0.005	0.005	0.000	22	0.01
2020		0.005	*	*	*	0.005	0.000	7	0.01
2019		0.005	0.005	*	0.005	0.005	0.000	26	0.01
2018		*	*	*	*	*	*	0	*
2017		0.005	0.005	*	0.005	0.005	0.000	20	0.01
2016		0.005	0.005	0.005	0.005	0.01	0.002	30	0.01
2015		0.005	0.005	*	0.02	0.04	0.009	25	0.01
2014		0.005	0.005	*	0.02	0.04	0.009	27	0.01
2013		0.005	0.005	0.005	0.005	0.01	0.001	31	0.01
2012		0.005	0.005	0.005	0.005	0.01	0.002	30	0.01
2011		0.005	0.005	0.008	0.01	0.03	0.005	31	0.01
2010		0.005	0.01	0.010	0.01	0.02	0.003	31	0.01
2009		0.005	0.01	*	0.02	0.02	0.005	27	0.01
2008		0.01	0.01	0.014	0.02	0.02	0.005	30	0.01
2007		0.01	0.02	0.018	0.02	0.02	0.004	30	0.01
2006		0.02	0.02	0.021	0.02	0.03	0.003	29	0.01
2005		0.02	0.02	0.025	0.03	0.03	0.005	31	0.01
2004		0.02	0.03	0.030	0.04	0.04	0.007	29	0.01
2003		0.03	0.04	0.053	0.09	0.21	0.035	30	0.01
2002		0.04	0.05	*	0.06	0.06	0.008	26	0.01
2001		0.04	0.08	0.095	0.14	0.21	0.046	31	0.01
2000		0.05	0.09	0.092	0.14	0.17	0.032	30	0.01
1999		0.05	0.08	*	0.15	0.19	0.041	17	0.01
1998		0.04	0.09	*	0.15	0.17	0.044	13	0.01
1997		0.10	*	*	*	0.10	1.77	1	0.01
1996		0.09	0.25	0.643	1.4	10	1.77	31	0.01
1995		0.11	0.62	0.798	1.5	3.1	0.727	31	0.01
1994		0.13	0.91	1.14	1.9	5.2	0.984	31	0.01
1993		0.19	0.95	1.36	2.9	3.7	1.03	29	0.01
1992		0.23	1.3	1.49	3.21	5.1	1.13	30	0.01
1991		0.44	1.55	2.07	4.53	6.6	1.67	28	0.01
1990		0.26	1.55	1.92	4.03	6.4	1.54	28	0.01
1989		0.25	1.35	*	2.8	6.8	1.43	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.