Know Your Environment. Protect Your Health.

MTBE

Lakeway Harbor 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.

 

9

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
2021ND40ND
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
2018-02-14Q1806270007ND
2019-03-20Q1911659002ND
2020-03-18Q2012015001ND
2021-03-10Q2106424002ND
2021-05-26Q2113682004ND
2021-08-16Q2121818004ND
2021-10-12Q2128285004ND
2022-01-10Q2200510007ND
2023-01-12Q2301979002ND