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	Annual Toxics Summary Chula Vista 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	960	*	1700	2100	534	28	51
2012		270	710	*	1400	1800	393	26	60
2011		180	610	*	1300	1800	437	25	60
2010		30	670	697	1300	1500	380	28	60
2009		200	1100	1110	1900	2100	590	30	60
2008		200	930	989	1600	2200	520	30	20
2007		150	890	*	2300	2600	775	23	60
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		380	*	*	*	1200	306	5	2
2002		270	900	1050	1800	2200	531	30	2
2001		240	1200	1170	1900	2700	669	28	2
2000		350	1200	*	1800	2400	648	11	2
1999		260	1200	*	2100	2700	712	17	2
1998		330	1100	1110	1900	2600	656	27	2
1997		150	940	1070	2000	4200	865	29	2
1996		350	1000	1090	1900	3300	680	30	2
1995		350	990	1190	2000	3300	684	29	2
1994		230	930	1130	2200	3700	875	30	2
1993		340	1100	1520	2500	3000	859	27	2
1992		210	1100	1200	2300	4100	904	28	2
1991		290	1500	1440	2500	2900	823	29	2
1990		350	1100	*	1800	3200	727	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.