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EWG's Tap Water Database — 2021 UPDATE

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MTBE

Paramount Water Department

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

 

37

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND110ND
2015ND50ND
2016ND50ND
2017ND50ND
2018ND50ND
2019ND60ND

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
2014-02-279588-027-1001ND
2014-02-279588-025-0954ND
2014-04-289588-027-1034ND
2014-04-289588-015-1100ND
2014-04-289588-025-1032ND
2014-04-289588-016-1127ND
2014-04-289588-024-1106ND
2014-07-299588-027-1035ND
2014-07-299588-025-1020ND
2014-10-299588-027-1020ND
2014-10-299588-025-1027ND
2015-01-299588-027-1531ND
2015-01-299588-025-1527ND
2015-04-279588-024-1006ND
2015-04-279588-016-0945ND
2015-04-279588-015-1003ND
2016-01-299588-025-0948ND
2016-01-299588-027-0954ND
2016-04-299588-015-0956ND
2016-04-299588-016-0923ND
2016-04-299588-024-0959ND
2017-01-239588-025-1045ND
2017-01-239588-027-1047ND
2017-04-039588-024-1112ND
2017-04-039588-015-1124ND
2017-04-039588-016-1020ND
2018-01-089588-027-1136ND
2018-01-089588-025-1130ND
2018-04-099588-024-1046ND
2018-04-099588-015-1041ND
2018-04-169588-016-0940ND
2019-01-079588-025-1028ND
2019-03-209588-027-1030ND
2019-03-209588-025-1025ND
2019-04-039588-024-1040ND
2019-04-039588-016-1010ND
2019-04-039588-015-1035ND