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	Annual Toxics Summary Chico-Manzanita Avenue 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		65	*	*	*	460	163	5	5
2002		61	400	411	600	1100	214	31	5
2001		62	290	352	680	1400	267	32	3
2000		44	290	373	680	1700	323	31	3
1999		100	350	430	860	1100	265	30	3
1998		78	230	321	770	1100	249	32	3
1997		73	280	340	630	1000	219	30	3
1996		66	330	356	640	800	208	29	3
1995		87	300	343	630	1000	232	29	3
1994		100	430	420	700	1100	242	30	3
1993		100	290	349	790	840	242	29	3
1992		120	340	*	970	1200	342	16	3
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.