Know Your Environment. Protect Your Health.

MTBE

Walnut Springs

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
2018ND20ND
2019ND20ND
2020N/A00N/A
2021ND20ND
2022ND20ND
2023ND30ND

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
2018-04-02AE20869ND
2018-04-02AE20875ND
2019-11-07AE88913ND
2019-11-07AE88919ND
2021-08-05AF65081ND
2021-08-05AF65093ND
2022-04-07AF92453ND
2022-10-17AG17266ND
2023-02-07AG27731ND
2023-02-07AG27737ND
2023-05-01AG38650ND