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	Annual Toxics Summary Chico-Manzanita Avenue 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		12	*	*	*	27	7.1	5	2
2002		13	45	51.2	68	210	38.1	31	2
2001		7.5	34	42.8	86	100	28.3	32	15
2000		7.5	46	45.9	70	92	23.0	31	15
1999		7.5	48	56.2	97	140	33.9	30	15
1998		7.5	39	47.8	98	120	30.9	32	15
1997		7.5	35	45.8	71	270	47.4	30	15
1996		7.5	45	45.4	68	110	22.7	29	15
1995		7.5	23	28.8	63	80	21.7	29	15
1994		7.5	22	*	43	50	12.5	15	15
1993		*	*	*	*	*	*	0	*
1992		16	*	*	*	72	24.0	6	2
1991		*	*	*	*	*	*	0	*
1990		*	*	*	*	*	*	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.