Know Your Environment. Protect Your Health.

MTBE

Mountain Regional Water Special Service 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.

 

50

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND130ND
2020ND60ND
2021ND50ND
2022ND130ND
2023ND80ND

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 Result
2018-03-20ND
2018-06-06ND
2018-06-20ND
2018-08-23ND
2018-09-05ND
2019-01-03ND
2019-01-03ND
2019-01-03ND
2019-01-03ND
2019-01-24ND
2019-01-24ND
2019-01-24ND
2019-02-25ND
2019-02-25ND
2019-02-25ND
2019-03-20ND
2019-04-18ND
2019-11-14ND
2020-03-02ND
2020-07-14ND
2020-07-14ND
2020-09-21ND
2020-12-04ND
2020-12-30ND
2021-03-16ND
2021-06-03ND
2021-06-08ND
2021-08-04ND
2021-12-08ND
2022-02-17ND
2022-02-17ND
2022-02-17ND
2022-02-17ND
2022-05-04ND
2022-05-05ND
2022-05-05ND
2022-05-05ND
2022-08-04ND
2022-09-07ND
2022-12-06ND
2022-12-06ND
2022-12-07ND
2023-03-16ND
2023-06-21ND
2023-09-21ND
2023-11-06ND
2023-11-06ND
2023-11-06ND
2023-12-11ND
2023-12-11ND