MTBE
Town of Berlin
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.
17
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 | 0.377 ppb | 3 | 1 | ND - 1.13 ppb |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | 0.325 ppb | 2 | 1 | ND - 0.650 ppb |
| 2023 | 0.210 ppb | 3 | 1 | ND - 0.630 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 |
|---|---|---|
| 2018-03-28 | E18003510004 | 1.13 ppb |
| 2018-03-28 | E18003510006 | ND |
| 2018-03-28 | E18003510001 | ND |
| 2019-08-29 | E20000856001 | ND |
| 2019-08-29 | E20000856004 | ND |
| 2019-08-29 | E20000856008 | ND |
| 2020-07-27 | E21000258006 | ND |
| 2020-07-27 | E21000258004 | ND |
| 2020-07-27 | E21000258001 | ND |
| 2021-05-06 | E21003198001 | ND |
| 2021-05-06 | E21003199001 | ND |
| 2021-05-06 | E21003200001 | ND |
| 2022-02-16 | 021622_01_021722256 | 0.650 ppb |
| 2022-02-16 | 021622_02_021722259 | ND |
| 2023-05-17 | E2300288306 | 0.630 ppb |
| 2023-05-17 | E2300290201 | ND |
| 2023-06-08 | E2300290106 | ND |