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EWG's Tap Water Database

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MTBE

Talbotton

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20103.48 ppb660.560 ppb - 9.00 ppb
20113.19 ppb73ND - 8.60 ppb
20124.83 ppb444.10 ppb - 6.80 ppb
20133.70 ppb441.70 ppb - 6.60 ppb
20143.90 ppb43ND - 6.80 ppb
20156.30 ppb116.30 ppb

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 13 ppb

The 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
2010-03-31AG858280.700 ppb
2010-03-31AG858270.560 ppb
2010-03-31AG858260.840 ppb
2010-03-31AG858259.00 ppb
2010-08-23AG994085.10 ppb
2010-11-02AH098254.70 ppb
2011-03-28AH261798.60 ppb
2011-03-28AH26180ND
2011-03-28AH26181ND
2011-03-28AH26182ND
2011-06-07AH31367ND
2011-08-16AH377048.50 ppb
2011-11-08AH460405.20 ppb
2012-02-21AH537396.80 ppb
2012-05-01AH578214.20 ppb
2012-07-26AH714404.20 ppb
2012-11-19AH843294.10 ppb
2013-02-14AH892141.70 ppb
2013-05-09AI010681.80 ppb
2013-07-29AI076704.70 ppb
2013-11-04AI220516.60 ppb
2014-01-23AI270972.40 ppb
2014-05-05AI39581ND
2014-07-24AI466616.40 ppb
2014-11-06AI592536.80 ppb
2015-02-19AI652576.30 ppb