Know Your Environment. Protect Your Health.

MTBE

South Grafton 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.

 

23

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
2020N/A00N/A
2021N/A00N/A
2022ND30ND
2023ND200ND

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
2022-09-06ND
2022-10-03ND
2022-11-07ND
2023-02-06ND
2023-02-06ND
2023-03-06ND
2023-03-06ND
2023-04-03ND
2023-04-03ND
2023-05-01ND
2023-05-01ND
2023-05-01ND
2023-06-12ND
2023-06-12ND
2023-07-10ND
2023-07-10ND
2023-08-07ND
2023-08-07ND
2023-09-05ND
2023-09-05ND
2023-10-02ND
2023-11-06ND
2023-12-04ND