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EWG's Tap Water Database — 2019 UPDATE

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MTBE

Fort Bend County MUD 25

MTBE was used as gasoline oxygenation additive to boost the octane number. In 2005, MTBE was replaced by ethanol as a gasoline additive. MTBE causes cancers in rats.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND10ND
2014ND10ND
2015ND50ND
2016ND50ND
2017ND30ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 13 ppb

The EWG Health Guideline of 13 ppb for MTBE was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2012-03-20AB84532ND
2013-02-28AC11759ND
2014-05-16AC54455ND
2015-02-04AC79293ND
2015-02-04AC79295ND
2015-02-04AC79265ND
2015-02-04AC79289ND
2015-06-02AC94168ND
2016-01-19AD18648ND
2016-01-19AD18642ND
2016-01-19AD18622ND
2016-06-21AD41365ND
2016-08-02AD46709ND
2017-01-12AD64770ND
2017-01-12AD64784ND
2017-01-12AD64774ND