Know Your Environment. Protect Your Health.

MTBE

Smithville

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019N/A00N/A
2020N/A00N/A
202114.5 ppb4412.0 ppb - 16.0 ppb
202217.0 ppb2216.0 ppb - 18.0 ppb
202315.5 ppb2215.0 ppb - 16.0 ppb

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
2018-05-15AJ89544ND
2018-05-15AJ89545ND
2021-11-11AK9063316.0 ppb
2021-11-11AK9063415.0 ppb
2021-12-08AK9223712.0 ppb
2021-12-08AK9223815.0 ppb
2022-05-02AL0012918.0 ppb
2022-05-02AL0013016.0 ppb
2023-03-07AL2683515.0 ppb
2023-03-07AL2683616.0 ppb