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	Annual Toxics Summary Fremont-Chapel Way FAQs Zinc 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		*	*	*	*	*	*	0	*
2012		*	*	*	*	*	*	0	*
2011		*	*	*	*	*	*	0	*
2010		4.5	*	*	*	24	8.2	8	9
2009		10	24	*	40	54	11.7	28	9
2008		*	*	*	*	*	*	0	*
2007		11	31	*	85	110	27.5	22	3
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		27	*	*	*	56	10.4	5	1
2002		8	32	*	50	55	15.0	24	1
2001		14	33	*	56	64	15.5	27	2
2000		10	32	36.9	67	86	21.0	28	2
1999		16	45	44.9	71	100	19.8	28	2
1998		18	33	41.8	69	150	27.8	25	2
1997		12	27	*	65	86	18.9	28	2
1996		7	31	38.4	80	140	30.7	30	2
1995		10	37	39.1	75	110	25.4	30	2
1994		7	32	39.7	80	120	26.6	29	2
1993		6	40	46.0	88	130	31.2	29	2
1992		5	28	27.3	44	53	12.5	31	2
1991		6	29	33.9	72	82	22.6	29	2
1990		9	41	*	70	90	24.5	15	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.