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

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2023		27	51	*	98	365	71.4	21	9.98
2022		4.99	57	82.0	170	289	70.1	30	9.98
2021		19	73	*	220	342	92.3	23	9.98
2020		17	*	*	*	178	55.0	7	9.98
2019		4.99	100	*	380	808	206	24	9.98
2018		4.99	76	*	320	353	116	20	9.98
2017		5	60	139	330	1040	228	30	10
2016		15	65	193	440	866	216	29	10
2015		5	120	269	490	1490	348	30	10
2014		4.2	51	115	280	1000	201	28	8.4
2013		12	70	*	560	1000	275	25	5.2
2012		13	50	*	260	350	105	18	9
2011		4.5	21	*	92	890	199	19	9
2010		13	48	*	170	220	60.8	16	9
2009		4.5	35	*	180	1400	256	29	9
2008		*	*	*	*	*	*	0	*
2007		18	120	*	460	690	206	18	3
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		22	*	*	*	160	54.4	5	1
2002		8	69	74.2	130	300	62.9	29	1
2001		6	46	85.0	150	890	162	30	2
2000		12	40	*	110	230	48.4	29	2
1999		12	39	60.3	180	270	71.5	27	2
1998		21	58	64.2	110	130	35.5	27	2
1997		9	84	*	200	210	66.6	24	2
1996		13	63	89.8	210	300	73.2	28	2
1995		19	57	*	180	220	61.9	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.