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	Annual Toxics Summary Calexico-Ethel Street FAQs Iron nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2025		1830	*	*	*	1830	1300	1	69.4
2024		326	1600	1910	3500	5930	1300	30	26
2023		644	1400	1680	2300	5870	925	31	69.4
2022		533	1500	1640	2500	3560	695	30	69.4
2021		586	1500	*	3100	3840	944	23	69.4
2020		554	*	*	*	3460	1090	7	69.4
2019		156	1900	*	3600	5300	1220	24	69.4
2018		748	1500	*	2400	3990	705	23	69.4
2017		320	1600	1670	2900	5300	1080	30	69.4
2016		372	1700	2130	3400	6840	1340	29	69.4
2015		388	1800	2040	3400	3810	956	30	69.4
2014		280	1600	1790	3100	3800	1010	28	55
2013		290	1300	*	2200	3400	731	27	30
2012		230	690	802	1300	2300	495	27	30
2011		59	690	728	1300	1600	417	27	30
2010		260	680	824	1300	2600	517	28	30
2009		110	690	732	1500	1800	493	31	30
2008		590	1400	1460	2300	3300	694	30	1
2007		240	1100	*	2400	3300	790	26	30
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		1000	*	*	*	3800	1130	5	1
2002		500	2200	2230	3500	4800	1110	29	1
2001		210	1800	1710	2600	3100	745	30	2
2000		600	1900	*	3200	3900	880	29	2
1999		610	1700	1820	3800	4700	1070	27	2
1998		1000	1600	1960	3100	6100	1080	27	2
1997		560	2000	*	3900	5400	1270	24	2
1996		550	1700	1770	2700	3700	848	28	2
1995		580	2800	*	3800	5200	1360	15	2
1994		*	*	*	*	*	*	0	*
1993		*	*	*	*	*	*	0	*
1992		*	*	*	*	*	*	0	*
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.