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	Annual Toxics Summary Concord-2975 Treat Blvd FAQs Chloroform parts per billion

Read About Estimated Risk

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit	Estimated Risk
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		*	*	*	*	*	*	0	*	*
2002		*	*	*	*	*	*	0	*	*
2001		*	*	*	*	*	*	0	*	*
2000		0.01	*	*	*	0.04	0.015	5	0.02	*
1999		0.01	0.03	*	0.06	0.08	0.020	21	0.02	*
1998		0.01	0.03	*	0.04	0.32	0.077	15	0.02	*
1997		0.01	0.03	0.029	0.05	0.06	0.014	28	0.02	2
1996		0.01	0.03	0.032	0.04	0.14	0.024	31	0.02	2
1995		0.01	0.04	0.041	0.07	0.13	0.026	30	0.02	3
1994		0.01	0.01	0.026	0.05	0.14	0.025	32	0.02	2
1993		0.01	0.03	0.032	0.06	0.08	0.022	30	0.02	2
1992		0.01	0.03	0.029	0.05	0.07	0.016	31	0.02	2
1991		0.01	0.02	0.031	0.07	0.10	0.025	29	0.02	2
1990		0.01	0.03	0.031	0.06	0.07	0.018	28	0.02	2
1989		0.02	0.03	0.038	0.06	0.10	0.020	22	0.02	3

	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.