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	Annual Toxics Summary Los Angeles-North Main Street 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		260	*	*	*	1000	290	5	5
2002		280	650	649	900	1100	225	29	5
2001		64	440	*	620	1000	233	22	3
2000		35	440	452	760	1700	299	31	3
1999		110	480	866	950	16000	2830	30	3
1998		11	520	*	660	860	194	26	3
1997		220	490	*	910	1300	306	17	3
1996		50	560	519	800	1700	326	29	3
1995		98	500	523	840	1100	262	28	3
1994		70	600	630	970	1300	278	28	3
1993		150	600	*	850	890	240	23	3
1992		13	640	*	890	5700	1140	21	3
1991		160	540	603	910	1300	254	28	3
1990		230	770	*	1700	5700	1240	17	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.