MTBE
Genoa
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.
11
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 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 3 | 0 | ND |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2020-01-16 | 0013218-01 | ND |
| 2020-01-16 | 0013218-03 | ND |
| 2020-01-16 | 0013218-04 | ND |
| 2020-02-13 | 0022593-01 | ND |
| 2021-04-15 | ED03164-01 | ND |
| 2021-07-13 | EG03220-01 | ND |
| 2021-10-13 | EJ02899-01 | ND |
| 2022-01-13 | FA02505-01 | ND |
| 2022-05-11 | FE02755-01 | ND |
| 2022-08-02 | FH01349-01 | ND |
| 2023-02-07 | GB01903-01 | ND |