Know Your Environment. Protect Your Health.

MTBE

Joshua Basin Water District

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.

 

7

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019N/A00N/A
2020ND10ND
2021N/A00N/A
2022ND10ND
2023ND30ND

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
2018-02-14CA3610025_011_011-201802140845ND
2018-05-10CA3610025_008_008-201805100600ND
2020-07-29CA3610025_005_005-202007290845ND
2022-10-03CA3610025_010_010-202210030823ND
2023-08-30CA3610025_005_005-202308301000ND
2023-08-30CA3610025_009_009-202308300830ND
2023-11-07CA3610025_011_011-202311070928ND