MTBE
Newfield Water Department
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 | 1.00 ppb | 3 | 1 | ND - 3.01 ppb |
| 2019 | 3.61 ppb | 3 | 3 | 3.30 ppb - 3.93 ppb |
| 2020 | 4.69 ppb | 1 | 1 | 4.69 ppb |
| 2021 | 2.06 ppb | 2 | 1 | ND - 4.11 ppb |
| 2022 | 2.94 ppb | 1 | 1 | 2.94 ppb |
| 2023 | 3.67 ppb | 1 | 1 | 3.67 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 |
|---|---|---|
| 2018-09-12 | Q78226VOC | 3.01 ppb |
| 2018-09-12 | Q78227VOC | ND |
| 2018-10-23 | Q79497VOC | ND |
| 2019-03-11 | R82465VOC | 3.93 ppb |
| 2019-06-05 | R85564VOC | 3.30 ppb |
| 2019-08-13 | R87720SOC | 3.60 ppb |
| 2020-03-17 | S93256VOC | 4.69 ppb |
| 2021-03-03 | T104110VOC | 4.11 ppb |
| 2021-03-03 | T104111VOC | ND |
| 2022-03-24 | U117244VOC | 2.94 ppb |
| 2023-03-08 | V127146VOC | 3.67 ppb |