MTBE
Wyoming Water System
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.
3
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 | N/A | 0 | 0 | N/A |
| 2019 | 3.60 ppb | 1 | 1 | 3.60 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 4.30 ppb | 1 | 1 | 4.30 ppb |
| 2022 | 3.60 ppb | 1 | 1 | 3.60 ppb |
| 2023 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2019-08-26 | OE856627 | 3.60 ppb |
| 2021-08-13 | OE1798848 | 4.30 ppb |
| 2022-08-09 | OE2151967 | 3.60 ppb |