Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

MTBE

Hynes Estates Mutual 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.

MORE ABOUT THIS CONTAMINANT

 

35

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND70ND
2015ND50ND
2016ND60ND
2017ND50ND
2018ND40ND
2019ND80ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2014-01-154417-002-1300ND
2014-01-154417-001-1235ND
2014-02-244417-001-1215ND
2014-02-244417-001-1210ND
2014-04-014417-001-1350ND
2014-07-024417-001-1300ND
2014-10-224417-001-1010ND
2015-01-154417-002-0940ND
2015-03-184417-001-1120ND
2015-04-204417-001-1120ND
2015-08-034417-001-1115ND
2015-10-014417-001-0915ND
2016-01-134417-002-1040ND
2016-01-134417-001-1115ND
2016-04-044417-001-1025ND
2016-07-054417-001-0930ND
2016-07-144417-001-1150ND
2016-10-034417-001-1010ND
2017-01-044417-001-1030ND
2017-04-134417-001-1230ND
2017-04-134417-002-1040ND
2017-07-254417-001-0905ND
2017-10-264417-001-0840ND
2018-01-044417-001-0900ND
2018-04-164417-001-1115ND
2018-07-034417-001-0935ND
2018-10-094417-001-1015ND
2019-01-084417-001-1130ND
2019-04-014417-001-0840ND
2019-07-014417-001-1000ND
2019-07-104417-005-1130ND
2019-08-224417-005-1045ND
2019-08-224417-005-1035ND
2019-10-024417-001-1000ND
2019-11-074417-005-1310ND