California Home	ARB:	Home	Search	Site Map				Contact Us

	Annual Toxics Summary Chico-Manzanita Avenue FAQs 1,3-Butadiene 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
2024		*	*	*	*	*	*	0	*	*
2023		*	*	*	*	*	*	0	*	*
2022		*	*	*	*	*	*	0	*	*
2021		*	*	*	*	*	*	0	*	*
2020		*	*	*	*	*	*	0	*	*
2019		*	*	*	*	*	*	0	*	*
2018		*	*	*	*	*	*	0	*	*
2017		*	*	*	*	*	*	0	*	*
2016		*	*	*	*	*	*	0	*	*
2015		*	*	*	*	*	*	0	*	*
2014		*	*	*	*	*	*	0	*	*
2013		*	*	*	*	*	*	0	*	*
2012		0.02	0.02	*	0.13	0.24	0.068	12	0.04	*
2011		0.02	0.02	0.072	0.19	0.37	0.096	30	0.04	78
2010		0.02	0.02	0.056	0.13	0.30	0.062	30	0.04	61
2009		0.02	0.05	0.071	0.18	0.35	0.084	31	0.04	77
2008		0.02	0.02	0.074	0.19	0.31	0.080	31	0.04	80
2007		0.02	0.04	0.060	0.18	0.24	0.064	29	0.04	65
2006		0.02	0.02	0.057	0.13	0.24	0.056	30	0.04	61
2005		0.02	0.05	0.108	0.33	0.74	0.156	31	0.04	117
2004		0.02	0.06	0.132	0.36	0.48	0.147	30	0.04	142
2003		0.02	0.07	0.111	0.31	0.43	0.123	31	0.04	120
2002		0.02	0.07	0.154	0.38	0.60	0.156	30	0.04	167
2001		0.02	0.10	0.157	0.36	0.88	0.184	31	0.04	170
2000		0.02	0.06	0.142	0.40	0.74	0.177	30	0.04	154
1999		0.02	0.12	0.149	0.32	0.57	0.118	30	0.04	161
1998		0.02	0.14	0.170	0.35	0.58	0.150	31	0.04	184
1997		0.02	0.14	*	0.46	0.76	0.189	29	0.04	*
1996		0.02	0.10	0.216	0.60	1.0	0.237	31	0.04	234
1995		0.02	0.16	0.205	0.47	0.76	0.169	30	0.04	221
1994		0.02	0.16	0.249	0.48	0.96	0.217	31	0.04	269
1993		0.02	0.18	0.295	0.65	0.99	0.257	30	0.04	318
1992		0.02	0.21	*	0.38	0.68	0.169	16	0.04	*
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.