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EWG's Tap Water Database — 2021 UPDATE

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MTBE

SCWA Mather-Sunrise

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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56

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
2014ND100ND
2015ND90ND
2016ND130ND
2017ND80ND
2018ND80ND
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
2014-02-055810-008-1318ND
2014-08-135810-019-1238ND
2014-08-135810-017-1106ND
2014-08-135810-016-1145ND
2014-08-135810-015-1205ND
2014-08-135810-008-0800ND
2014-08-135810-007-0817ND
2014-08-135810-006-1005ND
2014-08-135810-001-0914ND
2014-08-135810-002-0842ND
2015-08-195810-001-1227ND
2015-08-195810-008-1046ND
2015-08-195810-007-1037ND
2015-08-195810-006-1155ND
2015-08-195810-002-1324ND
2015-08-205810-019-1016ND
2015-08-205810-017-0819ND
2015-08-205810-016-0856ND
2015-08-205810-015-0930ND
2016-08-095810-019-1430ND
2016-08-095810-017-1455ND
2016-08-095810-016-1505ND
2016-08-095810-001-1350ND
2016-08-095810-015-1449ND
2016-08-095810-008-1251ND
2016-08-095810-002-1321ND
2016-08-095810-007-1249ND
2016-08-245810-006-0815ND
2016-11-085810-001-1024ND
2016-11-085810-002-1047ND
2016-11-085810-006-1001ND
2016-11-085810-007-1106ND
2017-08-085810-016-1230ND
2017-08-085810-002-1017ND
2017-08-085810-001-1001ND
2017-08-085810-008-0948ND
2017-08-085810-017-1207ND
2017-08-085810-015-1141ND
2017-08-085810-019-1058ND
2017-08-085810-006-1028ND
2018-08-095810-006-1416ND
2018-08-095810-002-1354ND
2018-08-095810-015-1526ND
2018-08-095810-008-1334ND
2018-08-095810-001-1438ND
2018-08-165810-019-1130ND
2018-08-165810-017-1239ND
2018-08-165810-016-1343ND
2019-05-065810-007-1415ND
2019-08-135810-001-1254ND
2019-08-135810-017-1525ND
2019-08-135810-019-1151ND
2019-08-135810-006-1237ND
2019-08-135810-008-1325ND
2019-08-155810-016-0800ND
2019-08-155810-015-0824ND