Know Your Environment. Protect Your Health.

MTBE

Clarence Cannon Wholesale Water Commission

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND40ND
2020ND30ND
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
2018-11-05AD36259ND
2019-01-31AD39215ND
2019-04-09AD46647ND
2019-07-11AD52705ND
2019-10-21AD57363ND
2020-01-13AD60684ND
2020-07-202011492ND
2020-10-282016556ND
2021-11-092119459ND
2022-04-212204250ND
2023-04-242303340ND