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	Annual Toxics Summary Concord-2975 Treat Blvd FAQs Phosphorus 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	*
2010		*	*	*	*	*	*	0	*
2009		*	*	*	*	*	*	0	*
2008		*	*	*	*	*	*	0	*
2007		*	*	*	*	*	*	0	*
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		*	*	*	*	*	*	0	*
2002		*	*	*	*	*	*	0	*
2001		*	*	*	*	*	*	0	*
2000		16	*	*	*	43	11.8	4	15
1999		16	36	39.3	61	120	24.0	27	15
1998		7.5	31	*	49	75	14.5	19	15
1997		7.5	25	*	48	73	17.0	22	15
1996		7.5	18	20.5	50	66	18.7	26	15
1995		7.5	7.5	19.3	41	82	19.2	27	15
1994		7.5	7.5	*	21	51	11.3	16	15
1993		*	*	*	*	*	*	0	*
1992		1	1	*	22	30	9.8	13	2
1991		1	4	8.8	25	36	10.5	27	2
1990		1	11	*	28	32	10.0	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.