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	Annual Toxics Summary San Jose-4th 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		*	*	*	*	*	*	0	*
2002		240	*	*	*	450	63.8	10	8
2001		120	380	427	700	1300	267	30	3
2000		71	370	366	510	980	181	28	3
1999		130	340	376	530	1200	193	30	3
1998		150	320	439	680	2400	426	29	3
1997		83	340	349	560	670	147	30	3
1996		82	350	337	540	600	144	28	3
1995		57	350	332	610	820	214	30	3
1994		100	360	371	560	910	178	31	3
1993		120	410	453	790	1200	252	29	3
1992		120	470	486	720	1100	216	30	3
1991		130	400	509	830	1300	307	28	3
1990		240	590	*	1100	1100	264	15	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.