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	Annual Toxics Summary Chula Vista FAQs Potassium nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2025		*	*	*	*	*	*	0	*
2024		*	*	*	*	*	*	0	*
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		150	*	*	*	620	196	5	5
2002		190	340	399	560	930	164	30	5
2001		180	300	320	440	610	98.8	28	3
2000		150	350	*	510	580	129	11	3
1999		30	400	*	520	1100	224	17	3
1998		180	330	384	550	760	149	27	3
1997		85	380	410	640	890	186	29	3
1996		120	310	336	530	620	128	30	3
1995		150	410	392	560	750	152	29	3
1994		130	390	403	510	1000	161	30	3
1993		130	370	381	580	700	156	27	3
1992		120	320	329	590	630	145	28	3
1991		200	330	346	460	700	116	29	3
1990		230	480	*	770	840	173	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.