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Methyl tertiary-Butyl Ether
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
0.15 * * * 0.15 0.00 7 0.3 *
2003
0.15 0.15 0.24 0.4 1.7 0.31 29 0.3 1
2002
0.3 1.0 1.19 2.1 3.3 0.69 30 0.3 6
2001
0.5 1.2 1.37 2.5 3.6 0.80 31 0.3 7
2000
0.4 1.1 1.48 3.3 4.3 1.08 31 0.3 8
1999
0.4 1.9 * 2.4 3.8 0.80 27 0.3 *
1998
0.15 1.6 1.64 3.3 4.7 1.07 30 0.3 9
1997
1.7 * * * 3.7 0.74 7 0.3 *
1996
* * * * * * 0 * *
1995
* * * * * * 0 * *
1994
* * * * * * 0 * *
1993
* * * * * * 0 * *
1992
* * * * * * 0 * *
1991
* * * * * * 0 * *
1990
* * * * * * 0 * *
1989
* * * * * * 0 * *
Graph It!
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.