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	Annual Toxics Summary Simi Valley-Cochran Street FAQs Potassium nanograms per cubic meter

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	*
2011		*	*	*	*	*	*	0	*
2010		*	*	*	*	*	*	0	*
2009		*	*	*	*	*	*	0	*
2008		*	*	*	*	*	*	0	*
2007		*	*	*	*	*	*	0	*
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		180	*	*	*	820	300	4	5
2002		160	550	569	970	1300	287	29	5
2001		61	480	*	880	9800	1940	24	3
2000		64	390	*	590	650	175	15	3
1999		110	590	*	910	2400	445	27	3
1998		110	390	415	680	1200	246	29	3
1997		58	430	472	760	1200	251	31	3
1996		33	520	473	820	940	259	29	3
1995		70	460	550	990	1300	361	31	3
1994		150	470	*	830	1300	287	27	3
1993		58	480	542	960	1700	375	31	3
1992		110	510	*	1200	1700	407	22	3
1991		90	570	595	950	1200	279	28	3
1990		150	880	*	1800	3000	719	16	3
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.