MTBE
Town of Poolesville
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.
13
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 | ND | 3 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 8 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2019-07-02 | E20000017001 | ND |
| 2019-07-02 | E20000017004 | ND |
| 2019-07-02 | E20000017006 | ND |
| 2021-01-21 | E21001857001 | ND |
| 2021-01-21 | E21001857004 | ND |
| 2021-04-06 | E21002753001 | ND |
| 2021-04-06 | E21002753004 | ND |
| 2021-07-13 | E22000119001 | ND |
| 2021-08-05 | E22000416001 | ND |
| 2021-08-05 | E22000416004 | ND |
| 2021-10-05 | E2200028701 | ND |
| 2023-04-18 | E2300236508 | ND |
| 2023-04-18 | E2300236520 | ND |