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EWG's Tap Water Database — 2019 UPDATE

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MTBE

Littlerock Creek Irrigation District

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.

 

16

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
2013N/A00N/A
2014ND40ND
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
2014-03-043761-008-0800ND
2014-03-043761-011-0830ND
2014-03-043761-019-0845ND
2014-03-043761-021-0900ND
2015-08-043761-008-0740ND
2015-08-043761-011-0750ND
2015-08-043761-019-0800ND
2015-08-043761-021-0825ND
2016-08-023761-008-0818ND
2016-08-023761-011-0827ND
2016-08-023761-021-0833ND
2016-08-093761-019-0900ND
2017-08-153761-008-0900ND
2017-08-153761-011-0915ND
2017-08-153761-019-0930ND
2017-08-153761-021-0945ND