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	Annual Toxics Summary Burbank-W Palm Avenue FAQs Iron 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		770	1200	*	2000	2600	537	12	55
2013		400	1300	*	2200	3700	727	26	30
2012		230	950	989	1700	2300	506	29	30
2011		150	1100	*	1600	2000	399	23	30
2010		150	830	890	1400	2000	453	29	30
2009		180	1100	1060	1700	2100	523	30	30
2008		290	1700	1810	2700	4400	857	30	1
2007		530	1200	*	2000	2200	511	26	30
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		820	*	*	*	2000	458	5	1
2002		540	1700	1770	2600	3100	661	30	1
2001		220	1400	*	2300	2800	645	28	2
2000		290	1400	1470	2100	3900	732	31	2
1999		510	1500	*	2600	3700	740	25	2
1998		380	1400	1350	2000	2500	545	29	2
1997		490	1600	*	2500	3400	664	29	2
1996		210	1600	*	2200	2400	596	23	2
1995		220	1500	1550	2600	4300	907	31	2
1994		370	1700	*	2300	4200	760	27	2
1993		140	1700	1610	2400	3200	776	31	2
1992		560	1500	1970	2200	15000	2790	31	2
1991		340	1800	1860	2900	4500	944	28	2
1990		1000	2100	*	3400	4100	917	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.