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EWG's Tap Water Database — 2021 UPDATE

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MTBE

Azusa Light and Water

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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65

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND110ND
2015ND110ND
2016ND110ND
2017ND100ND
2018ND110ND
2019ND110ND

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
2014-08-069588-034-1000ND
2014-08-069588-033-0950ND
2014-08-069588-008-1105ND
2014-08-069588-007-1055ND
2014-08-069588-006-1040ND
2014-08-069588-005-1025ND
2014-08-069588-004-0920ND
2014-08-069588-003-0930ND
2014-09-179588-002-0910ND
2014-11-069588-010-0930ND
2014-11-069588-001-0910ND
2015-08-059588-008-0955ND
2015-08-059588-034-0915ND
2015-08-059588-005-0935ND
2015-08-059588-033-0905ND
2015-08-059588-004-0840ND
2015-08-059588-003-0850ND
2015-08-059588-007-0945ND
2015-08-059588-002-0925ND
2015-08-269588-006-0815ND
2015-11-049588-010-1030ND
2015-11-049588-001-0920ND
2016-08-099588-005-0940ND
2016-08-099588-033-0910ND
2016-08-099588-034-0920ND
2016-08-099588-006-1010ND
2016-08-099588-004-0930ND
2016-08-099588-003-0850ND
2016-08-099588-002-0845ND
2016-08-099588-007-1000ND
2016-08-099588-008-0950ND
2016-11-079588-010-0830ND
2016-11-079588-001-0815ND
2017-08-149588-007-0910ND
2017-08-149588-008-0940ND
2017-08-149588-002-0825ND
2017-08-149588-003-0815ND
2017-08-149588-004-0850ND
2017-08-149588-034-0835ND
2017-08-149588-033-0830ND
2017-08-149588-006-0925ND
2017-11-089588-001-0815ND
2017-11-089588-010-0830ND
2018-05-089588-005-0855ND
2018-08-089588-004-0815ND
2018-08-089588-007-0930ND
2018-08-089588-008-0945ND
2018-08-089588-002-0855ND
2018-08-089588-003-0825ND
2018-08-089588-034-0845ND
2018-08-089588-006-0915ND
2018-08-089588-033-0840ND
2018-11-069588-010-1120ND
2018-12-059588-001-0805ND
2019-05-219588-005-0915ND
2019-08-199588-004-0950ND
2019-08-199588-007-1020ND
2019-08-199588-034-0905ND
2019-08-199588-006-1010ND
2019-08-199588-003-0940ND
2019-08-199588-033-0915ND
2019-08-199588-008-1030ND
2019-09-259588-002-0710ND
2019-11-059588-010-0840ND
2019-11-059588-001-0820ND