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	Annual Toxics Summary Roseville-N Sunrise Blvd FAQs Perchloroethylene 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		0.005	0.005	*	0.01	0.04	0.008	20	0.01	*
2022		0.005	0.005	0.006	0.005	0.01	0.002	31	0.01	0.6
2021		0.005	0.005	*	0.005	0.02	0.002	23	0.01	*
2020		0.005	*	*	*	0.01	0.003	7	0.01	*
2019		0.005	0.005	0.006	0.005	0.01	0.002	30	0.01	0.7
2018		0.005	0.005	0.006	0.005	0.01	0.002	31	0.01	0.6
2017		0.005	0.005	0.005	0.005	0.005	0.000	30	0.01	0.6
2016		0.005	0.005	0.009	0.01	0.06	0.012	31	0.01	1
2015		0.005	0.005	0.008	0.01	0.04	0.007	30	0.01	0.9
2014		0.005	0.005	0.010	0.02	0.04	0.009	30	0.01	1
2013		0.005	0.005	0.008	0.02	0.03	0.007	31	0.01	0.9
2012		0.005	0.005	0.008	0.01	0.05	0.010	30	0.01	0.9
2011		0.005	0.005	0.009	0.02	0.03	0.006	31	0.01	1
2010		0.005	0.005	0.008	0.01	0.02	0.005	29	0.01	0.9
2009		0.005	0.005	0.007	0.01	0.02	0.004	31	0.01	0.8
2008		0.005	0.005	0.008	0.02	0.03	0.006	31	0.01	0.9
2007		0.005	0.01	0.012	0.02	0.04	0.009	30	0.01	1
2006		0.005	0.01	0.019	0.04	0.06	0.015	30	0.01	2
2005		0.005	0.01	0.014	0.03	0.04	0.011	31	0.01	2
2004		0.005	0.01	0.016	0.03	0.05	0.012	30	0.01	2
2003		0.005	0.02	0.022	0.05	0.06	0.016	31	0.01	3
2002		0.01	0.02	0.026	0.04	0.06	0.013	30	0.01	3
2001		0.01	0.03	0.031	0.05	0.09	0.018	29	0.01	4
2000		0.01	0.03	0.047	0.09	0.24	0.048	28	0.01	5
1999		0.005	0.02	*	0.03	0.06	0.014	19	0.01	*
1998		0.005	0.02	*	0.06	0.11	0.027	16	0.01	*
1997		0.01	0.05	0.063	0.16	0.20	0.056	29	0.01	7
1996		0.01	0.04	0.061	0.14	0.34	0.070	30	0.01	7
1995		0.01	0.05	0.051	0.08	0.16	0.034	30	0.01	6
1994		0.005	0.04	0.065	0.12	0.44	0.080	31	0.01	7
1993		0.01	0.04	*	0.08	0.09	0.024	23	0.01	*
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.