MTBE
Claflin, City of
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.
15
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 | N/A | 0 | 0 | N/A |
| 2021 | ND | 6 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2021-02-23 | 1778336 | ND |
| 2021-02-23 | 1778337 | ND |
| 2021-03-16 | 1796813 | ND |
| 2021-08-17 | 1920544 | ND |
| 2021-09-21 | 1964204 | ND |
| 2021-11-16 | 2027744 | ND |
| 2022-02-15 | 2194828 | ND |
| 2022-05-24 | 2264135 | ND |
| 2022-08-30 | 2346000 | ND |
| 2022-09-20 | 2362177 | ND |
| 2022-11-29 | 2404795 | ND |
| 2023-02-27 | 2455978 | ND |
| 2023-05-24 | 2506133 | ND |
| 2023-08-30 | 2566144 | ND |
| 2023-11-28 | 2615995 | ND |