Know Your Environment. Protect Your Health.

MTBE

Crown Ranch Subdivision

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND40ND
2020ND20ND
2021ND30ND
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
2018-06-14AE30058ND
2019-01-16AE50150ND
2019-04-16AE62572ND
2019-08-21AE79910ND
2019-12-09AE91676ND
2020-01-27AE95380ND
2020-01-27AE95388ND
2021-08-02AF64244ND
2021-08-02AF64246ND
2021-11-01AF75265ND
2022-01-20AF81008ND
2022-01-20AF81018ND
2023-07-18AG49042ND
2023-07-18AG49088ND