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	Annual Toxics Summary Bakersfield-5558 California Avenue FAQs HCFC-22 parts per billion

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2023		0.3	0.3	*	0.4	0.4	0.03	15	0.2
2022		0.3	0.4	0.38	0.5	0.5	0.05	29	0.2
2021		0.3	0.3	*	0.4	0.5	0.07	23	0.2
2020		0.2	*	*	*	0.4	0.06	7	0.2
2019		0.3	0.3	0.34	0.4	0.8	0.10	29	0.2
2018		0.3	0.4	*	0.7	1.8	0.32	33	0.2
2017		0.2	0.4	0.42	0.5	1.1	0.18	31	0.2
2016		0.3	0.4	0.63	0.8	2.9	0.50	31	0.2
2015		0.3	0.4	0.46	0.8	1.0	0.22	30	0.2
2014		0.3	0.5	*	0.7	0.8	0.16	16	0.2
2013		0.3	0.4	*	0.6	1.3	0.25	23	0.2
2012		0.3	0.5	0.57	0.7	1.9	0.30	33	0.2
2011		0.3	0.4	*	0.6	0.8	0.14	19	0.2
2010		0.3	0.5	*	0.9	1.6	0.31	26	0.2
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	*
1996		*	*	*	*	*	*	0	*
1995		*	*	*	*	*	*	0	*
1994		*	*	*	*	*	*	0	*
1993		*	*	*	*	*	*	0	*
1992		*	*	*	*	*	*	0	*
1991		*	*	*	*	*	*	0	*
1990		*	*	*	*	*	*	0	*
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.