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EWG's Tap Water Database — 2019 UPDATE

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MTBE

SBNDO County Service Area 70J

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND10ND
2014ND90ND
2015ND50ND
2016N/A00N/A
2017ND10ND

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
2012-01-063761-005-1035ND
2012-01-133761-003-0950ND
2012-10-163761-005-1300ND
2012-10-263761-002-1035ND
2013-10-183761-005-1020ND
2014-02-033761-005-1345ND
2014-02-033761-001-1130ND
2014-02-033761-003-0930ND
2014-02-033761-002-1030ND
2014-02-043761-004-1300ND
2014-04-033761-002-1215ND
2014-07-083761-001-1400ND
2014-07-103761-003-1425ND
2014-07-103761-004-1325ND
2015-01-063761-005-1210ND
2015-01-063761-003-1425ND
2015-01-063761-002-1350ND
2015-07-083761-005-1040ND
2015-07-293761-004-1000ND
2017-07-263761-001-1300ND