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EWG's Tap Water Database — 2021 UPDATE

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MTBE

City of Colton

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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28

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
2014ND30ND
2015ND10ND
2016ND120ND
2017N/A00N/A
2018ND20ND
2019ND100ND

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
2014-02-193761-030-0740ND
2014-05-083761-030-0740ND
2014-08-193761-030-0930ND
2015-08-203761-010-0640ND
2016-06-133761-016-1030ND
2016-09-073761-008-0800ND
2016-09-073761-024-1325ND
2016-09-073761-021-0845ND
2016-09-073761-011-0810ND
2016-09-073761-017-0705ND
2016-09-073761-030-0900ND
2016-09-073761-016-0925ND
2016-09-073761-015-0745ND
2016-09-073761-014-0730ND
2016-09-073761-010-1535ND
2016-12-143761-023-1020ND
2018-06-123761-023-1000ND
2018-09-063761-012-1330ND
2019-07-303761-017-0830ND
2019-09-123761-030-0955ND
2019-09-123761-017-1040ND
2019-09-123761-021-1100ND
2019-09-123761-016-1020ND
2019-09-123761-011-1320ND
2019-09-163761-023-0000ND
2019-09-163761-015-0000ND
2019-09-163761-010-0000ND
2019-09-163761-012-0000ND