MTBE

City of Bellmead

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.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	3	ND
2015	ND	6	ND
2016	ND	9	ND
2017	ND	7	ND
2018	ND	5	ND
2019	ND	5	ND

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
2014-04-16	AC50854	ND
2014-08-12	AC63081	ND
2014-08-12	AC63069	ND
2015-02-17	AC80818	ND
2015-02-17	AC80814	ND
2015-02-17	AC80816	ND
2015-02-17	AC80820	ND
2015-05-13	AC91875	ND
2015-05-13	AC91879	ND
2016-01-14	AD18285	ND
2016-01-14	AD18277	ND
2016-01-14	AD18291	ND
2016-04-11	AD32582	ND
2016-04-11	AD32584	ND
2016-07-13	AD44124	ND
2016-07-13	AD44122	ND
2016-10-11	AD53181	ND
2016-10-11	AD53183	ND
2017-02-06	AD69198	ND
2017-02-06	AD69200	ND
2017-02-06	AD69204	ND
2017-02-06	AD69202	ND
2017-04-04	AD78564	ND
2017-04-04	AD78566	ND
2017-04-04	AD78568	ND
2018-02-13	AE13562	ND
2018-02-13	AE13558	ND
2018-02-13	AE13572	ND
2018-02-13	AE13560	ND
2018-05-02	AE24825	ND
2019-05-21	AE67380	ND
2019-05-21	AE67388	ND
2019-05-21	AE67392	ND
2019-05-21	AE67390	ND
2019-06-10	AE69720	ND