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	Annual Toxics Summary Fresno-1st Street FAQs Zirconium 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		0.75	0.75	1.01	0.75	9.2	1.52	31	1.5
2010		0.75	0.75	1.04	0.75	7.2	1.35	27	1.5
2009		0.75	0.75	0.91	0.75	3.2	0.49	33	1.5
2008		*	*	*	*	*	*	0	*
2007		0.75	0.75	*	0.75	3.3	0.69	24	1.5
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		1	*	*	*	6.0	1.80	7	2.0
2002		1	4.0	4.61	7.6	12	2.71	29	2.0
2001		1	4.0	4.17	7.0	11	2.59	32	2.0
2000		1	4.0	3.75	6.2	11	2.33	29	2.0
1999		1	3.0	*	6.6	16	3.58	25	2.0
1998		1	2.5	3.11	7.0	9.0	2.47	26	2.0
1997		1	3.0	3.58	7.1	12	2.98	30	2.0
1996		1	3.0	3.07	6.0	10	2.30	29	2.0
1995		1	2.0	3.68	8.0	16	3.43	31	2.0
1994		1	4.0	*	7.6	9.0	2.63	25	2.0
1993		1	5.0	4.71	9.0	16	3.54	29	2.0
1992		1	3.0	3.82	8.0	10	2.65	31	2.0
1991		1	3.0	*	8.6	10	2.97	25	2.0
1990		3.0	6.0	*	11.5	14	3.36	16	2.0
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.