Know Your Environment. Protect Your Health.

MTBE

Ayer DPW Water Division

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.

 

44

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND80ND
2019ND100ND
2020ND80ND
2021ND90ND
2022ND20ND
2023ND70ND

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
2018-06-13ND
2018-08-14ND
2018-08-14ND
2018-08-14ND
2018-08-14ND
2018-08-14ND
2018-08-14ND
2018-08-14ND
2019-03-05ND
2019-03-05ND
2019-09-19ND
2019-09-19ND
2019-09-19ND
2019-09-19ND
2019-09-19ND
2019-09-19ND
2019-09-19ND
2019-12-10ND
2020-07-07ND
2020-07-07ND
2020-07-07ND
2020-07-07ND
2020-07-07ND
2020-07-07ND
2020-07-07ND
2020-07-07ND
2021-08-06ND
2021-08-06ND
2021-08-06ND
2021-08-06ND
2021-08-06ND
2021-08-06ND
2021-08-06ND
2021-10-19ND
2021-12-02ND
2022-01-19ND
2022-04-25ND
2023-05-02ND
2023-07-27ND
2023-08-07ND
2023-08-07ND
2023-08-07ND
2023-08-07ND
2023-08-07ND