MTBE
Elsberry PWS
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 | 2.52 ppb | 1 | 1 | 2.52 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 2.51 ppb | 3 | 2 | ND - 3.85 ppb |
| 2022 | 0.703 ppb | 3 | 1 | ND - 2.11 ppb |
| 2023 | 2.40 ppb | 3 | 2 | ND - 3.63 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 |
|---|---|---|
| 2018-05-14 | AD18724 | ND |
| 2019-04-24 | AD46827 | 2.52 ppb |
| 2021-04-27 | 2104194 | 3.69 ppb |
| 2021-04-27 | 2104195 | ND |
| 2021-04-27 | 2104196 | 3.85 ppb |
| 2022-04-21 | 2204849 | ND |
| 2022-04-21 | 2204848 | ND |
| 2022-04-21 | 2204850 | 2.11 ppb |
| 2023-04-19 | 2303897 | 3.63 ppb |
| 2023-04-19 | 2303895 | 3.57 ppb |
| 2023-04-19 | 2303896 | ND |