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	Annual Toxics Summary North Long Beach 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		300	*	*	*	890	279	4	5
2002		200	420	*	700	860	172	27	5
2001		130	440	433	630	820	170	28	3
2000		180	390	*	740	4800	869	29	3
1999		130	480	541	940	1900	391	26	3
1998		140	430	433	620	820	165	29	3
1997		150	530	570	1000	1100	267	30	3
1996		230	570	*	760	2200	396	23	3
1995		110	530	553	880	1000	219	29	3
1994		130	480	572	800	1100	227	29	3
1993		120	540	587	850	2400	412	30	3
1992		180	550	587	780	2500	409	30	3
1991		190	550	580	850	1500	285	28	3
1990		280	710	*	1400	2000	456	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.