Know Your Environment. Protect Your Health.

MTBE

Madera Co. Md1-hidden Lake Estates

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND10ND
2022ND10ND
2023ND10ND

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
2018-01-09CA2000544_001_001-201801090830ND
2019-01-22CA2000544_001_001-201901221045ND
2020-01-30CA2000544_001_001-202001300950ND
2021-01-20CA2000544_001_001-202101200927ND
2022-01-25CA2000544_001_001-202201251050ND
2023-03-22CA2000544_001_001-202303220930ND