Know Your Environment. Protect Your Health.

MTBE

Harmony Village

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.

 

6

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
2019N/A00N/A
2020ND10ND
2021ND40ND
2022ND10ND
2023N/A00N/A

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
2020-11-05CA5100125_001_001-202011050750ND
2021-01-13CA5100125_001_001-202101131410ND
2021-04-12CA5100125_001_001-202104120759ND
2021-07-06CA5100125_001_001-202107060916ND
2021-10-10CA5100125_001_001-202110100825ND
2022-01-04CA5100125_001_001-202201040818ND