Know Your Environment. Protect Your Health.

MTBE

East Pasadena Water Company

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2018-03-19CA1910020_012_012-201803190855ND
2018-03-19CA1910020_005_005-201803190940ND
2018-04-11CA1910020_012_012-201804111035ND
2018-07-12CA1910020_005_005-201807121035ND
2019-03-11CA1910020_012_012-201903110850ND
2019-03-11CA1910020_005_005-201903110920ND
2019-04-03CA1910020_012_012-201904031000ND
2019-07-29CA1910020_005_005-201907291225ND
2020-03-09CA1910020_012_012-202003090900ND
2020-03-09CA1910020_005_005-202003090940ND
2020-04-02CA1910020_012_012-202004021030ND
2020-07-09CA1910020_005_005-202007091040ND
2021-03-08CA1910020_012_012-202103080845ND
2021-03-08CA1910020_005_005-202103080910ND
2021-04-12CA1910020_012_012-202104121010ND
2021-07-13CA1910020_005_005-202107131115ND
2022-04-20CA1910020_012_012-202204201155ND
2022-08-09CA1910020_005_005-202208091125ND
2023-05-10CA1910020_012_012-202305101055ND
2023-08-16CA1910020_005_005-202308161040ND