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EWG's Tap Water Database — 2021 UPDATE

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MTBE

Wellborn SUD

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND30ND
2015ND80ND
2016ND40ND
2017ND40ND
2018ND50ND
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
2014-04-07AC49474ND
2014-04-07AC49476ND
2014-09-10AC66591ND
2015-03-24AC85862ND
2015-03-24AC85884ND
2015-03-24AC85872ND
2015-03-24AC85874ND
2015-03-24AC85864ND
2015-05-27AC93421ND
2015-09-30AD09128ND
2015-12-07AD15734ND
2016-03-09AD27931ND
2016-03-09AD27933ND
2016-03-09AD27937ND
2016-03-09AD27935ND
2017-03-07AD73764ND
2017-03-07AD73762ND
2017-11-21AE05570ND
2017-11-21AE05566ND
2018-03-15AE18640ND
2018-05-16AE26602ND
2018-05-16AE26604ND
2018-05-16AE26600ND
2018-05-16AE26606ND
2019-01-08AE49080ND
2019-01-08AE49078ND
2019-01-15AE49819ND
2019-06-06AE69501ND