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	Annual Toxics Summary Fresno-1st Street FAQs Copper 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		0.75	16	*	47.8	57	16.1	23	1.5
2010		3.2	15	*	38	44	12.8	22	1.5
2009		4.5	12	*	30.6	65	13.4	28	1.5
2008		*	*	*	*	*	*	0	*
2007		6.3	16.5	*	43	140	26.8	26	1.5
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		7.0	*	*	*	63	20.8	7	1.0
2002		4.0	26	31.0	57.6	88	21.3	29	1.0
2001		3.0	8.5	15.6	31.3	51	12.2	32	2.0
2000		4.0	21	25.3	42	75	17.3	29	2.0
1999		2.0	16	*	56	89	21.5	25	2.0
1998		4.0	15	26.7	65	120	30.8	26	2.0
1997		2.0	15.5	19.3	39.1	43	12.3	30	2.0
1996		2.0	11	14.3	28.8	61	13.6	29	2.0
1995		1	12	19.1	33	75	16.4	31	2.0
1994		5.0	13	*	25.2	70	14.9	25	2.0
1993		5.0	19	27.3	39.4	210	36.8	29	2.0
1992		10	22	29.0	41	130	21.2	31	2.0
1991		4.0	13	*	37.6	120	23.7	25	2.0
1990		7.0	22.5	*	35	87	18.6	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.