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EWG's Tap Water Database — 2021 UPDATE

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MTBE

City of Morgan Hill

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
2013N/A00N/A
2014ND50ND
2015ND30ND
2016ND70ND
2017ND50ND
2018ND40ND
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
2014-05-125810-032-0920ND
2014-05-125810-017-1015ND
2014-05-285810-012-0930ND
2014-06-235810-010-0815ND
2014-09-105810-043-0800ND
2015-05-185810-002-0900ND
2015-05-275810-043-0755ND
2015-07-211610-001-1010ND
2016-05-091610-015-0930ND
2016-05-091610-008-0815ND
2016-05-091610-016-0730ND
2016-05-091610-009-0900ND
2016-05-161610-040-0830ND
2016-05-161610-043-0740ND
2016-09-261610-043-0755ND
2017-05-081610-017-0900ND
2017-05-081610-032-0800ND
2017-05-221610-012-0720ND
2017-08-141610-043-1000ND
2017-11-271610-043-0750ND
2018-04-231610-043-0730ND
2018-07-161610-043-0730ND
2018-10-301610-001-0930ND
2018-11-061610-043-0925ND
2019-02-111610-043-0745ND
2019-02-111610-007-0745ND
2019-04-231610-043-0700ND
2019-05-071610-040-0715ND
2019-05-071610-009-0800ND
2019-05-071610-043-0630ND
2019-05-071610-016-0930ND
2019-05-071610-008-1000ND
2019-05-071610-015-0830ND
2019-08-051610-043-0700ND
2019-11-121610-043-0710ND