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EWG's Tap Water Database — 2019 UPDATE

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MTBE

City of Manteca

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND100ND
2013ND60ND
2014ND80ND
2015ND120ND
2016ND50ND
2017ND70ND

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
2012-02-085810-049-1130ND
2012-02-085810-044-0745ND
2012-02-085810-040-1035ND
2012-03-135810-013-1000ND
2012-05-085810-028-0810ND
2012-05-085810-016-1115ND
2012-05-085810-013-0710ND
2012-06-125810-049-0717ND
2012-11-135810-044-1033ND
2012-12-115810-036-1125ND
2013-03-135810-032-0640ND
2013-04-105810-012-0805ND
2013-06-055810-038-0745ND
2013-06-055810-034-0825ND
2013-07-175810-032-0730ND
2013-08-145810-014-0810ND
2014-01-145810-042-1055ND
2014-01-145810-036-0906ND
2014-02-115810-030-0835ND
2014-04-085810-040-0825ND
2014-06-105810-015-0720ND
2014-06-105810-042-0750ND
2014-07-085810-028-0803ND
2014-07-085810-016-0715ND
2015-02-105810-044-0644ND
2015-02-105810-040-0820ND
2015-05-125810-016-0725ND
2015-05-125810-028-1535ND
2015-05-125810-013-0750ND
2015-06-095810-049-0650ND
2015-07-215810-034-0812ND
2015-08-115810-015-0815ND
2015-09-085810-030-1045ND
2015-11-305810-044-1005ND
2015-12-095810-013-0625ND
2015-12-095810-036-0840ND
2016-03-085810-032-0540ND
2016-04-195810-012-0920ND
2016-06-145810-038-0645ND
2016-07-125810-032-0630ND
2016-08-235810-014-0715ND
2017-01-095810-036-1030ND
2017-01-095810-042-0947ND
2017-04-045810-042-0535ND
2017-06-135810-042-0745ND
2017-07-105810-016-0800ND
2017-07-105810-028-0847ND
2017-08-085810-015-0625ND