Know Your Environment. Protect Your Health.

MTBE

City of Rio Hondo

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND40ND
2021ND20ND
2022ND10ND
2023ND10ND

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
2018-08-15AE37208ND
2019-07-10AE73936ND
2020-03-06AF01729ND
2020-06-09AF14663ND
2020-08-19AF24306ND
2020-10-07AF29837ND
2021-01-27AF41377ND
2021-04-29AF51966ND
2022-02-03AF83317ND
2023-02-01AG27165ND