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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 0.5 0.57 1.3 2.3 0.51 31 0.3 3
2002
0.15 0.8 1.11 2.1 3.3 0.80 31 0.3 6
2001
0.4 0.9 1.32 2.6 4.3 1.04 30 0.3 7
2000
0.3 1.2 1.54 4.0 5.0 1.34 30 0.3 8
1999
0.5 1.6 * 3.8 4.8 1.27 28 0.3 *
1998
0.3 1.2 1.72 4.2 7.7 1.75 28 0.3 9
1997
0.5 1.8 * 4.9 6.3 1.78 24 0.3 *
1996
0.6 1.7 * 3.6 8.1 1.75 18 0.3 *
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.