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	Annual Toxics Summary Richmond-13th Street FAQs Chloroform parts per billion

Read About New Estimated Risk

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit	Estimated Risk
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		*	*	*	*	*	*	0	*	*
2002		*	*	*	*	*	*	0	*	*
2001		*	*	*	*	*	*	0	*	*
2000		*	*	*	*	*	*	0	*	*
1999		*	*	*	*	*	*	0	*	*
1998		*	*	*	*	*	*	0	*	*
1997		0.02	*	*	*	0.07	0.015	9	0.02	*
1996		0.01	0.02	0.027	0.05	0.06	0.014	31	0.02	2
1995		0.01	0.03	0.026	0.05	0.06	0.015	30	0.02	2
1994		0.01	0.01	0.016	0.03	0.05	0.011	30	0.02	1
1993		0.01	0.03	0.031	0.06	0.07	0.018	30	0.02	2
1992		0.01	0.01	0.018	0.04	0.06	0.014	29	0.02	1
1991		0.01	0.01	0.021	0.04	0.07	0.016	29	0.02	2
1990		0.01	0.03	*	0.06	0.20	0.041	28	0.02	*
1989		0.01	0.03	*	0.06	0.22	0.041	23	0.02	*

	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.