MTBE
Brunswick / Topsham Water District
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 | ND | 1 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2018-04-18 | 1804-01967-001 | ND |
| 2019-05-15 | 1905-01974-001 | ND |
| 2020-05-04 | 2005-00167-002 | ND |
| 2020-05-04 | 2005-00164-002 | ND |
| 2020-05-04 | 2005-00161-002 | ND |
| 2021-08-31 | 2108-05047-001 | ND |
| 2022-07-18 | 2207-03089-001 | ND |
| 2022-07-21 | 402201615-TSN | ND |
| 2023-05-02 | 2305-00382-001 | ND |
| 2023-05-02 | 2305-00379-001 | ND |
| 2023-06-20 | 2306-04105-001 | ND |