Know Your Environment. Protect Your Health.

MTBE

Hills & Dales

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND20ND
2021ND40ND
2022ND10ND
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
2018-10-31AE45068ND
2018-10-31AE45070ND
2019-12-17AE92707ND
2019-12-17AE92709ND
2020-12-02AF36275ND
2020-12-02AF36283ND
2021-05-18AF54403ND
2021-05-18AF54405ND
2021-09-07AF68995ND
2021-11-15AF76649ND
2022-12-20AG22372ND
2023-10-25AG61061ND
2023-10-25AG61063ND