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EWG's Tap Water Database — 2021 UPDATE

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MTBE

Tyler County Water Supply Corporation

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.

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34

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND60ND
2016ND80ND
2017ND60ND
2018ND50ND
2019ND50ND

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
2014-12-16AC75118ND
2014-12-16AC75114ND
2014-12-16AC75108ND
2014-12-29AC75829ND
2015-09-02AD05443ND
2015-09-02AD05447ND
2015-09-02AD05455ND
2015-09-02AD05439ND
2015-09-02AD05453ND
2015-09-02AD05441ND
2016-03-28AD30749ND
2016-03-28AD30751ND
2016-06-20AD41167ND
2016-06-20AD41179ND
2016-06-20AD41177ND
2016-06-20AD41149ND
2016-06-20AD41183ND
2016-09-15AD49756ND
2017-09-13AD96055ND
2017-09-13AD96009ND
2017-09-13AD95999ND
2017-11-09AE04349ND
2017-11-09AE04369ND
2017-11-09AE04351ND
2018-03-27AE20431ND
2018-03-27AE20427ND
2018-03-27AE20429ND
2018-03-27AE20435ND
2018-03-27AE20433ND
2019-03-05AE57142ND
2019-05-22AE67693ND
2019-05-22AE67697ND
2019-05-22AE67695ND
2019-11-26AE90633ND