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EWG's Tap Water Database — 2019 UPDATE

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MTBE

Forrest City Waterworks

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.

 

55

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.373 ppb94ND - 1.18 ppb
20130.260 ppb92ND - 1.60 ppb
20140.259 ppb93ND - 1.000 ppb
20150.425 ppb84ND - 1.05 ppb
20160.554 ppb95ND - 1.68 ppb
20170.158 ppb113ND - 0.730 ppb

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
2012-01-2512026006001ND
2012-01-25120260061010.550 ppb
2012-06-1312166002901ND
2012-06-1312166003101ND
2012-06-13121660030011.18 ppb
2012-08-2712242003701ND
2012-08-27122420038010.680 ppb
2012-10-02122780139010.950 ppb
2012-10-0212278014001ND
2013-02-1213044000901ND
2013-02-1213044000801ND
2013-04-0113094007301ND
2013-04-0113094007201ND
2013-04-0113094007101ND
2013-08-27132410002090.740 ppb
2013-08-2713241000309ND
2013-11-05133100009091.60 ppb
2013-11-0513310000809ND
2014-02-0514038000602ND
2014-02-0514038000701ND
2014-04-23141140143010.700 ppb
2014-04-2314114014002ND
2014-04-2314114013809ND
2014-08-2714240000702ND
2014-08-27142400012011.000 ppb
2014-11-24143300037010.630 ppb
2014-11-2414330003801ND
2015-01-12150150086010.830 ppb
2015-01-1215015008501ND
2015-04-08150990073010.780 ppb
2015-04-0815099007201ND
2015-08-2415238000602ND
2015-08-24152380007011.05 ppb
2015-12-0115337004801ND
2015-12-01153370049010.740 ppb
2016-02-16160490054010.730 ppb
2016-02-1616049005301ND
2016-04-20161120076010.950 ppb
2016-04-2016112007501ND
2016-07-06161890136090.670 ppb
2016-07-0616189013509ND
2016-08-24162370047011.68 ppb
2016-10-03162790032080.960 ppb
2016-10-0316279003108ND
2017-01-1617019008401ND
2017-01-16170190085010.730 ppb
2017-04-0317096000101ND
2017-04-0317096000209ND
2017-04-03170960048010.500 ppb
2017-07-0317187007001ND
2017-07-0317187007101ND
2017-07-0317187007202ND
2017-10-0317278005801ND
2017-10-03172780057010.510 ppb
2017-10-0317278005602ND