MTBE
Butano Canyon Mutual
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.
8
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 | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 1 | 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 |
|---|---|---|
| 2018-01-10 | CA4100503_001_001-201801101110 | ND |
| 2019-01-03 | CA4100503_001_001-201901031115 | ND |
| 2020-01-09 | CA4100503_001_001-202001091210 | ND |
| 2021-01-07 | CA4100503_001_001-202101071154 | ND |
| 2021-10-20 | CA4100503_001_001-202110200845 | ND |
| 2022-12-14 | CA4100503_001_001-202212140930 | ND |
| 2023-05-03 | CA4100503_001_001-202305030750 | ND |
| 2023-12-18 | CA4100503_001_001-202312181100 | ND |