MTBE
Domestic Water Company Royal Forest Subdivision
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.
13
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 | 2 | 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 |
|---|---|---|
| 2018-05-09 | AE25753 | ND |
| 2018-05-09 | AE25755 | ND |
| 2019-03-04 | AE56877 | ND |
| 2019-03-04 | AE56881 | ND |
| 2020-02-20 | AE99297 | ND |
| 2020-02-20 | AE99313 | ND |
| 2020-05-26 | AF12600 | ND |
| 2021-06-11 | AF57836 | ND |
| 2021-12-22 | AF79282 | ND |
| 2022-04-12 | AF92919 | ND |
| 2022-04-12 | AF92923 | ND |
| 2023-08-16 | AG52846 | ND |
| 2023-08-16 | AG52856 | ND |