Know Your Environment. Protect Your Health.

MTBE

East Walnut Grove [sws]

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.

 

7

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND20ND
2020N/A00N/A
2021N/A00N/A
2022ND20ND
2023ND20ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-05-07CA3400106_007_007-201805070930ND
2019-05-09CA3400106_007_007-201905090855ND
2019-08-05CA3400106_001_001-201908051020ND
2022-05-02CA3400106_007_007-202205020830ND
2022-08-15CA3400106_001_001-202208150822ND
2023-08-15CA3400106_001_001-202308151000ND
2023-08-15CA3400106_007_007-202308151015ND