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EWG's Tap Water Database — 2019 UPDATE

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MTBE

City of San Diego

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.

 

62

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND90ND
2013ND120ND
2014ND90ND
2015ND110ND
2016ND120ND
2017ND90ND

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
2012-02-019437-001-0000ND
2012-02-019437-006-0000ND
2012-02-019437-010-0000ND
2012-05-029437-001-0000ND
2012-05-029437-006-0000ND
2012-05-029437-010-0000ND
2012-08-019437-001-0000ND
2012-08-019437-006-0000ND
2012-08-019437-010-0000ND
2013-02-069437-010-0000ND
2013-02-069437-006-0000ND
2013-02-069437-001-0000ND
2013-05-019437-010-0000ND
2013-05-019437-001-0000ND
2013-05-019437-006-0000ND
2013-08-079437-006-0000ND
2013-08-079437-001-0000ND
2013-08-079437-010-0000ND
2013-11-069437-006-0000ND
2013-11-069437-001-0000ND
2013-11-069437-010-0000ND
2014-02-059437-006-0000ND
2014-02-059437-001-0000ND
2014-02-059437-010-0000ND
2014-05-079437-006-0000ND
2014-05-079437-001-0000ND
2014-05-079437-010-0000ND
2014-11-059437-006-0000ND
2014-11-059437-001-0000ND
2014-11-059437-010-0000ND
2015-02-049437-010-0000ND
2015-02-049437-001-0000ND
2015-05-069437-001-0000ND
2015-05-069437-010-0000ND
2015-05-069437-006-0000ND
2015-08-059437-001-0000ND
2015-08-059437-010-0000ND
2015-08-059437-006-0000ND
2015-11-189437-001-0000ND
2015-11-189437-010-0000ND
2015-11-189437-006-0000ND
2016-02-089437-001-0000ND
2016-02-089437-010-0000ND
2016-02-089437-006-0000ND
2016-05-049437-001-0000ND
2016-05-049437-010-0000ND
2016-05-049437-006-0000ND
2016-08-049437-006-0000ND
2016-08-049437-001-0000ND
2016-08-049437-010-0000ND
2016-11-029437-006-0000ND
2016-11-029437-001-0000ND
2016-11-029437-010-0000ND
2017-02-019437-006-0000ND
2017-02-019437-001-0000ND
2017-02-019437-010-0000ND
2017-05-039437-006-0000ND
2017-05-039437-001-0000ND
2017-05-039437-010-0000ND
2017-11-019437-010-0000ND
2017-11-019437-001-0000ND
2017-11-019437-006-0000ND