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	Annual Toxics Summary Fresno-1st Street 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
2023		*	*	*	*	*	*	0	*	*
2022		*	*	*	*	*	*	0	*	*
2021		*	*	*	*	*	*	0	*	*
2020		*	*	*	*	*	*	0	*	*
2019		*	*	*	*	*	*	0	*	*
2018		*	*	*	*	*	*	0	*	*
2017		*	*	*	*	*	*	0	*	*
2016		*	*	*	*	*	*	0	*	*
2015		*	*	*	*	*	*	0	*	*
2014		*	*	*	*	*	*	0	*	*
2013		*	*	*	*	*	*	0	*	*
2012		0.14	*	*	*	0.14	0.075	1	0.04	*
2011		0.02	0.02	0.072	0.20	0.25	0.075	30	0.04	78
2010		0.02	0.02	0.059	0.16	0.21	0.060	30	0.04	64
2009		0.02	0.02	0.084	0.26	0.34	0.097	32	0.04	91
2008		0.02	0.04	0.071	0.16	0.27	0.069	31	0.04	77
2007		0.02	0.02	0.086	0.26	0.35	0.105	29	0.04	93
2006		0.02	0.05	0.082	0.21	0.30	0.085	31	0.04	88
2005		0.02	0.07	0.101	0.29	0.47	0.117	34	0.04	109
2004		0.02	0.02	0.098	0.26	0.39	0.106	30	0.04	106
2003		0.02	0.06	0.127	0.30	0.58	0.151	31	0.04	137
2002		0.02	0.07	0.194	0.47	1.0	0.225	31	0.04	209
2001		0.02	0.10	0.182	0.42	0.90	0.226	30	0.04	197
2000		0.02	0.09	0.195	0.62	1.0	0.285	30	0.04	211
1999		0.02	0.15	0.214	0.46	0.84	0.225	31	0.04	232
1998		0.02	0.15	0.265	0.78	1.0	0.295	31	0.04	287
1997		0.02	0.14	0.233	0.71	1.0	0.268	31	0.04	252
1996		0.02	0.13	0.234	0.49	1.0	0.230	31	0.04	253
1995		0.02	0.17	0.300	0.78	1.4	0.340	30	0.04	325
1994		0.02	0.22	0.356	0.79	1.8	0.380	31	0.04	384
1993		0.02	0.20	0.342	0.84	1.4	0.347	30	0.04	370
1992		0.02	0.16	0.262	0.61	0.93	0.268	30	0.04	283
1991		0.02	0.19	0.459	1.21	1.7	0.509	30	0.04	496
1990		0.02	0.14	*	1.04	1.6	0.466	24	0.04	*
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.