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EWG's Tap Water Database — 2019 UPDATE

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MTBE

Newhall Cwd-pinetree

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND30ND
2014ND20ND
2015N/A00N/A
2016N/A00N/A
2017ND10ND

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
2012-01-129590-001-1030ND
2012-02-099590-001-1155ND
2012-02-099590-003-1120ND
2012-02-099590-008-1100ND
2012-05-109590-001-0916ND
2013-02-149590-001-1025ND
2013-02-149590-003-1015ND
2013-02-149590-008-1034ND
2014-02-139590-003-1235ND
2014-02-139590-008-1300ND
2017-04-069590-008-0935ND