Know Your Environment. Protect Your Health.

MTBE

Cazadero Water Company Inc.

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND20ND
2020ND20ND
2021N/A00N/A
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
2019-03-22CA4900508_006_006-201903221050ND
2019-08-02CA4900508_005_005-201908021052ND
2020-12-21CA4900508_001_001-202012210908ND
2020-12-21CA4900508_011_011-202012210909ND
2022-11-03CA4900508_005_005-202211031155ND
2022-11-03CA4900508_006_006-202211031102ND
2023-03-06CA4900508_001_001-202303060818ND
2023-03-06CA4900508_011_011-202303060925ND