MTBE
Fallbrook Utility District
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.
12
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 | 2 | 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 |
|---|---|---|
| 2018-04-12 | AE22306 | ND |
| 2018-04-12 | AE22324 | ND |
| 2019-05-22 | AE67711 | ND |
| 2019-05-22 | AE67713 | ND |
| 2020-07-08 | AF18632 | ND |
| 2020-07-08 | AF18652 | ND |
| 2021-05-03 | AF52136 | ND |
| 2021-05-03 | AF52138 | ND |
| 2022-03-23 | AF90216 | ND |
| 2022-03-23 | AF90220 | ND |
| 2023-07-26 | AG50198 | ND |
| 2023-07-26 | AG50204 | ND |