MTBE
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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.
14
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 3 | 0 | ND |
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 |
|---|---|---|
| 2018-01-29 | AJ78029 | ND |
| 2018-01-29 | AJ78030 | ND |
| 2019-02-04 | AK10435 | ND |
| 2019-02-04 | AK10436 | ND |
| 2020-01-27 | AK40284 | ND |
| 2020-01-27 | AK40285 | ND |
| 2020-01-27 | AK40286 | ND |
| 2021-02-01 | AK68534 | ND |
| 2021-02-01 | AK68535 | ND |
| 2022-02-14 | AK95330 | ND |
| 2022-02-14 | AK95331 | ND |
| 2023-02-13 | AL25247 | ND |
| 2023-02-13 | AL25248 | ND |
| 2023-05-24 | AL32377 | ND |