MTBE

Beachwood Water Department

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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	ND	4	0	ND
2015	0.198 ppb	4	1	ND - 0.790 ppb
2016	0.345 ppb	8	4	ND - 1.05 ppb
2017	0.494 ppb	5	3	ND - 1.03 ppb
2018	ND	4	0	ND
2019	0.272 ppb	5	2	ND - 0.710 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
2014-02-05	A16105	ND
2014-05-02	A16504	ND
2014-08-27	A17337	ND
2014-12-01	A17901	ND
2015-02-04	A18340	ND
2015-05-29	A19105	ND
2015-08-27	A19729	ND
2015-11-16	A20302	0.790 ppb
2016-01-06	A20516	ND
2016-02-03	A20810	0.680 ppb
2016-04-06	A21201	ND
2016-05-09	A21496	ND
2016-07-19	A21943	0.560 ppb
2016-08-26	D9372	0.470 ppb
2016-10-04	A22525	ND
2016-11-28	A22835	1.05 ppb
2017-02-24	A23409	1.03 ppb
2017-05-18	A24029	ND
2017-08-31	A24719	0.580 ppb
2017-10-03	A24946	ND
2017-11-30	A24324	0.860 ppb
2018-03-09	A25834	ND
2018-05-31	A26353	ND
2018-10-31	A27476	ND
2018-11-29	A27678	ND
2019-02-26	A28185	ND
2019-05-29	A28712	ND
2019-08-16	A29299	ND
2019-10-31	A29832	0.710 ppb
2019-11-27	A30008	0.650 ppb