MTBE
Clarence Cannon Wholesale Water Commission
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 | ND | 1 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 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 |
|---|---|---|
| 2018-11-05 | AD36259 | ND |
| 2019-01-31 | AD39215 | ND |
| 2019-04-09 | AD46647 | ND |
| 2019-07-11 | AD52705 | ND |
| 2019-10-21 | AD57363 | ND |
| 2020-01-13 | AD60684 | ND |
| 2020-07-20 | 2011492 | ND |
| 2020-10-28 | 2016556 | ND |
| 2021-11-09 | 2119459 | ND |
| 2022-04-21 | 2204250 | ND |
| 2023-04-24 | 2303340 | ND |