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EWG's Tap Water Database — 2019 UPDATE

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MTBE

Averydale 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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND70ND
2014ND30ND
2015ND40ND
2016ND40ND
2017ND40ND

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
2013-05-143761-006-1314ND
2013-05-143761-004-1232ND
2013-05-143761-001-1300ND
2013-08-133761-006-1127ND
2013-08-133761-004-1013ND
2013-08-133761-001-1121ND
2013-08-133761-003-1022ND
2014-08-193761-006-1320ND
2014-08-193761-003-1346ND
2014-09-093761-001-0918ND
2015-02-173761-004-1414ND
2015-10-133761-001-1515ND
2015-10-133761-003-1442ND
2015-10-133761-006-1532ND
2016-02-163761-004-1412ND
2016-08-163761-001-1425ND
2016-08-163761-006-1421ND
2016-08-163761-003-1345ND
2017-02-213761-004-1343ND
2017-08-223761-006-1437ND
2017-08-223761-003-1347ND
2017-08-223761-001-1429ND