Know Your Environment. Protect Your Health.

MTBE

Palmer Center Ugarc

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.

 

30

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND40ND
202017.9 ppb93ND - 112.0 ppb
20211.22 ppb51ND - 6.10 ppb
202219.0 ppb54ND - 58.6 ppb
20230.820 ppb41ND - 3.28 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-01-10UG180098POCND
2018-05-09PC180872ND
2018-10-09PC182388ND
2019-01-07PC190059ND
2019-04-24WD190998ND
2019-07-1707171903ND
2019-10-1410151907ND
2020-01-0601072016-POCND
2020-04-220422201844.4 ppb
2020-05-1205122005ND
2020-06-0106012004ND
2020-07-0107012020112.0 ppb
2020-07-20072020034.70 ppb
2020-08-1108112028-1-RAWND
2020-08-1108112028-2-DSND
2020-10-0110012002-2ND
2021-01-0501052119-PND
2021-01-25EHS2100013303PND
2021-04-0504052105NND
2021-07-0107012103ND
2021-10-04100421136.10 ppb
2022-01-04010422119.13 ppb
2022-04-0504052212ND
2022-07-050705222912.3 ppb
2022-08-0108012215-114.9 ppb
2022-10-0410042216-258.6 ppb
2023-01-0301032324-13.28 ppb
2023-04-0304032305ND
2023-07-05PC232245ND
2023-10-185530295ND