MTBE
Woodville
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 | 3.13 ppb | 3 | 3 | 2.90 ppb - 3.50 ppb |
| 2019 | 3.30 ppb | 1 | 1 | 3.30 ppb |
| 2020 | 3.30 ppb | 1 | 1 | 3.30 ppb |
| 2021 | 5.60 ppb | 1 | 1 | 5.60 ppb |
| 2022 | 5.60 ppb | 1 | 1 | 5.60 ppb |
| 2023 | 4.10 ppb | 1 | 1 | 4.10 ppb |
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 |
|---|---|---|
| 2018-01-09 | AJ76343 | 2.90 ppb |
| 2018-04-09 | AJ87024 | 3.00 ppb |
| 2018-07-16 | AJ94369 | 3.50 ppb |
| 2019-05-15 | AK17599 | 3.30 ppb |
| 2020-05-11 | AK45786 | 3.30 ppb |
| 2021-06-21 | AK77817 | 5.60 ppb |
| 2022-03-14 | AK97064 | 5.60 ppb |
| 2023-03-28 | AL28005 | 4.10 ppb |