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

Read About Estimated Risk

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit	Estimated Risk
2023		1.6	4.4	*	10.4	37.3	7.42	21	1.3	*
2022		1.4	5.7	8.39	19.4	27.7	7.13	30	1.3	0.3
2021		0.65	3.3	*	27.9	444	91.3	23	1.3	*
2020		1.4	*	*	*	19.5	5.48	7	1.3	*
2019		0.65	8.5	*	34.4	64.8	16.6	24	1.3	*
2018		0.65	8.4	*	22.6	31.7	8.73	23	1.3	*
2017		0.65	9.1	*	42.5	91	20.9	27	1.3	*
2016		0.65	7.3	17.6	41.8	70.2	18.2	29	1.3	0.6
2015		0.65	12.5	26.7	42.4	181	36.5	30	1.3	0.9
2014		0.85	6.1	14.3	35	110	22.5	28	1.7	0.5
2013		0.5	13	*	51.8	110	25.2	25	1.0	*
2012		0.75	9.3	16.8	46	54	17.2	27	1.5	0.6
2011		0.75	9.4	*	26.2	53	13.1	18	1.5	*
2010		1.6	8.8	*	32	300	63.3	21	1.5	*
2009		0.75	5.0	14.8	30	130	23.8	31	1.5	0.5
2008		*	*	*	*	*	*	0	*	*
2007		2.6	25	*	81	110	33.9	17	1.5	*
2006		*	*	*	*	*	*	0	*	*
2005		*	*	*	*	*	*	0	*	*
2004		*	*	*	*	*	*	0	*	*
2003		4.0	*	*	*	37	12.7	5	3.0	*
2002		1.5	16	16.5	36.6	60	14.7	29	3.0	0.6
2001		2	9.5	15.3	30.1	100	19.2	30	4.0	0.5
2000		2	11	*	28	42	9.16	29	4.0	*
1999		2	11	15.1	37.4	72	17.0	27	4.0	0.5
1998		2	15	20.0	43.4	78	18.6	27	4.0	0.7
1997		2	28	*	43.7	58	16.4	24	4.0	*
1996		2	24.5	32.4	61.2	190	36.8	28	4.0	1
1995		4.0	31	*	48.4	75	19.5	15	4.0	*
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.