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EWG's Tap Water Database — 2021 UPDATE

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MTBE

Rosamond CSD

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.

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59

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
2014ND90ND
2015ND100ND
2016ND100ND
2017ND90ND
2018ND130ND
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
2014-02-183761-002-1000ND
2014-05-063761-009-1045ND
2014-05-063761-006-0905ND
2014-05-063761-002-1030ND
2014-08-193761-009-1040ND
2014-08-193761-006-0920ND
2014-08-193761-002-1025ND
2014-11-183761-006-0950ND
2014-11-183761-002-1040ND
2015-02-173761-002-1020ND
2015-05-193761-002-1020ND
2015-05-193761-006-0905ND
2015-07-213761-002-1054ND
2015-07-213761-006-0910ND
2015-07-283761-009-1040ND
2015-08-183761-009-0930ND
2015-08-183761-002-0950ND
2015-08-183761-006-1035ND
2015-12-083761-002-0900ND
2016-03-083761-002-1105ND
2016-03-083761-006-1025ND
2016-06-073761-006-1045ND
2016-06-073761-002-1000ND
2016-06-143761-009-0920ND
2016-09-063761-002-0950ND
2016-09-063761-006-1045ND
2016-09-063761-009-1005ND
2016-11-293761-002-0955ND
2016-11-293761-006-1115ND
2017-02-283761-002-1000ND
2017-05-233761-006-1035ND
2017-05-233761-002-0930ND
2017-06-063761-009-0930ND
2017-08-293761-002-0935ND
2017-08-293761-006-1040ND
2017-08-293761-009-0915ND
2017-11-143761-002-0930ND
2017-11-143761-006-1030ND
2018-03-063761-002-0940ND
2018-05-223761-002-0900ND
2018-05-223761-009-0935ND
2018-05-223761-006-1045ND
2018-05-293761-009-0940ND
2018-05-293761-002-0920ND
2018-05-293761-006-1045ND
2018-08-143761-006-1025ND
2018-08-143761-009-0935ND
2018-08-143761-002-0915ND
2018-11-203761-006-1055ND
2018-11-203761-009-0945ND
2018-11-203761-002-0930ND
2019-03-193761-006-1010ND
2019-03-193761-002-1030ND
2019-03-193761-009-1045ND
2019-05-283761-002-0920ND
2019-05-283761-009-0945ND
2019-05-283761-006-1035ND
2019-08-133761-002-0955ND
2019-08-133761-009-0935ND