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	Annual Toxics Summary North Long Beach FAQs Sulfur 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		170	870	*	1500	2300	518	20	51
2012		140	660	*	1400	1700	404	26	60
2011		120	630	819	1700	2000	527	29	60
2010		190	900	915	1500	3500	678	24	60
2009		270	1200	1300	2400	3800	877	29	60
2008		240	950	1040	2000	2300	603	29	20
2007		210	1500	*	2600	2800	772	21	60
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		590	*	*	*	1300	331	4	2
2002		270	1300	*	2100	3100	691	27	2
2001		370	1400	1430	2500	3400	797	28	2
2000		440	1300	*	2400	2600	696	29	2
1999		260	970	994	1900	2300	544	26	2
1998		340	1000	1250	2800	3000	868	29	2
1997		220	1100	1220	2000	3000	759	30	2
1996		280	930	*	1700	2400	556	23	2
1995		280	1100	1200	2100	2800	664	29	2
1994		300	1300	1470	2800	4800	1040	29	2
1993		360	1100	1540	3300	3500	1070	30	2
1992		290	1500	1530	2700	5300	1130	30	2
1991		380	1700	1880	3100	5000	1180	28	2
1990		210	1400	*	2900	3100	917	16	2
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.