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EWG's Tap Water Database — 2021 UPDATE

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MTBE

Rubidoux Community SD

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

 

75

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND120ND
2016ND120ND
2017ND150ND
2018ND90ND
2019ND110ND

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
2014-05-154790-002-0915ND
2014-05-154790-013-0815ND
2014-05-154790-015-0755ND
2014-05-154790-014-0800ND
2014-06-174790-013-0830ND
2014-06-174790-002-0900ND
2014-06-174790-014-0945ND
2014-06-174790-015-0930ND
2014-06-184790-006-0915ND
2014-06-184790-004-0930ND
2014-12-294790-014-0940ND
2014-12-294790-013-1010ND
2014-12-294790-006-0830ND
2014-12-294790-004-0820ND
2014-12-294790-002-0920ND
2014-12-294790-015-0935ND
2015-06-234790-013-0935ND
2015-06-234790-015-0950ND
2015-06-234790-014-1000ND
2015-06-234790-006-1155ND
2015-06-234790-004-1025ND
2015-06-234790-002-0920ND
2015-12-224790-015-0830ND
2015-12-224790-014-0840ND
2015-12-224790-013-0910ND
2015-12-224790-002-0855ND
2015-12-234790-006-1050ND
2015-12-234790-004-1010ND
2016-03-184790-006-1110ND
2016-05-104790-002-1030ND
2016-05-104790-014-1100ND
2016-05-104790-006-1215ND
2016-05-104790-013-1045ND
2016-05-104790-004-1200ND
2016-06-074790-004-1210ND
2016-06-074790-015-1000ND
2016-06-074790-014-1005ND
2016-06-074790-006-1220ND
2016-06-074790-002-1020ND
2016-06-074790-013-0950ND
2017-05-104790-013-1000ND
2017-05-104790-002-0930ND
2017-05-104790-004-1045ND
2017-05-104790-006-1115ND
2017-05-104790-014-1025ND
2017-06-014790-013-0815ND
2017-06-014790-004-1000ND
2017-06-014790-014-0830ND
2017-06-014790-006-1020ND
2017-06-064790-002-0930ND
2017-12-074790-002-0840ND
2017-12-074790-014-0855ND
2017-12-074790-006-1100ND
2017-12-074790-013-0905ND
2017-12-074790-004-1110ND
2018-07-034790-014-1130ND
2018-07-034790-013-1115ND
2018-07-034790-006-1345ND
2018-07-114790-002-0000ND
2018-12-134790-028-0900ND
2018-12-134790-014-0930ND
2018-12-134790-006-1025ND
2018-12-134790-013-0940ND
2018-12-134790-002-0855ND
2019-03-284790-029-1315ND
2019-05-084790-013-0915ND
2019-05-084790-002-0816ND
2019-05-094790-006-1330ND
2019-06-184790-002-0920ND
2019-06-184790-006-1135ND
2019-06-184790-028-0925ND
2019-06-184790-013-1000ND
2019-06-184790-004-0815ND
2019-10-024790-029-0140ND
2019-12-034790-006-1255ND