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	Annual Toxics Summary Riverside-Rubidoux FAQs Barium 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		*	*	*	*	*	*	0	*
2013		*	*	*	*	*	*	0	*
2012		*	*	*	*	*	*	0	*
2011		*	*	*	*	*	*	0	*
2010		*	*	*	*	*	*	0	*
2009		*	*	*	*	*	*	0	*
2008		*	*	*	*	*	*	0	*
2007		*	*	*	*	*	*	0	*
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		9.5	*	*	*	62	22.8	5	19
2002		9.5	76	79.6	120	160	38.4	31	19
2001		12.5	72	72.2	120	140	36.1	30	25
2000		12.5	57	60.0	100	150	34.6	29	25
1999		12.5	61	62.8	120	280	56.7	28	25
1998		26	63	*	82	83	19.4	12	25
1997		12.5	*	*	*	12.5	23.4	1	25
1996		12.5	48	48.8	80	86	23.4	27	25
1995		12.5	45	57.1	110	140	39.6	30	25
1994		12.5	50	56.4	85	140	27.1	30	25
1993		12.5	55	56.0	110	130	37.5	28	25
1992		12.5	37	42.7	81	100	30.1	30	25
1991		12.5	12.5	35.9	71	180	36.6	30	25
1990		12.5	12.5	*	82	110	32.4	15	25
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.