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EWG's Tap Water Database — 2021 UPDATE

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MTBE

Jefferson County Public Water Supply District 6

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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35

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND40ND
2016ND40ND
2017ND70ND
2018ND80ND
2019ND40ND

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
2014-02-05AC17713ND
2014-04-29AC22529ND
2014-07-30AC30081ND
2014-08-27AC33816ND
2014-08-27AC33817ND
2014-08-27AC33819ND
2014-08-27AC33818ND
2014-12-23AC37328ND
2015-02-02AC41372ND
2015-05-11AC50694ND
2015-08-03AC55478ND
2015-11-03AC62089ND
2016-02-01AC65846ND
2016-04-28AC70179ND
2016-08-03AC80850ND
2016-10-20AC86080ND
2017-01-23AC89910ND
2017-04-25AC95147ND
2017-07-25AD02418ND
2017-08-29AD04370ND
2017-08-29AD04369ND
2017-08-29AD04368ND
2017-10-27AD08625ND
2018-01-23AD12096ND
2018-05-08AD18749ND
2018-05-08AD18748ND
2018-06-25AD28042ND
2018-06-25AD28043ND
2018-07-13AD29649ND
2018-07-13AD29650ND
2018-10-18AD35206ND
2019-01-15AD38514ND
2019-04-17AD46854ND
2019-07-18AD52848ND
2019-10-23AD57537ND