Know Your Environment. Protect Your Health.

MTBE

R P M Water Supply Corporation

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.

 

12

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
2021ND20ND
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
2018-09-17Q1836803001ND
2018-09-17Q1836803004ND
2019-08-14Q1955294001ND
2019-08-14Q1955294003ND
2020-08-27Q2034439005ND
2020-08-27Q2034439007ND
2021-08-16Q2121820001ND
2021-08-16Q2121820003ND
2022-10-20Q2231924001ND
2022-10-20Q2231924003ND
2023-08-31Q2337826011ND
2023-08-31Q2337826015ND