Know Your Environment. Protect Your Health.

MTBE

Valley 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.

 

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
2019ND10ND
2020ND10ND
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
2019-05-03JH1902589-POCND
2020-06-04JH2004331-POCND
2021-08-17JH2107268-POCND
2021-09-28JH2108940-POCSND
2022-05-26JH2204083-POCND
2022-07-21JH2205820-POCND
2023-02-16JH2301279-POCND
2023-08-10JH2306818-POCND