MTBE
Halifax Water Department
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.
39
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 | 2.24 ppb | 7 | 5 | ND - 5.30 ppb |
| 2019 | 1.12 ppb | 6 | 3 | ND - 2.80 ppb |
| 2020 | 1.18 ppb | 6 | 4 | ND - 3.00 ppb |
| 2021 | 0.250 ppb | 6 | 1 | ND - 1.50 ppb |
| 2022 | 0.757 ppb | 7 | 3 | ND - 2.10 ppb |
| 2023 | 1.37 ppb | 7 | 5 | ND - 2.10 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 | Result |
|---|---|
| 2018-03-23 | 2.80 ppb |
| 2018-06-28 | 5.30 ppb |
| 2018-09-13 | 3.00 ppb |
| 2018-12-18 | 3.40 ppb |
| 2018-12-18 | ND |
| 2018-12-18 | ND |
| 2018-12-18 | 1.20 ppb |
| 2019-03-21 | 2.80 ppb |
| 2019-09-24 | 2.50 ppb |
| 2019-12-06 | 1.40 ppb |
| 2019-12-06 | ND |
| 2019-12-06 | ND |
| 2019-12-06 | ND |
| 2020-03-18 | 3.00 ppb |
| 2020-06-30 | 1.60 ppb |
| 2020-09-30 | 1.30 ppb |
| 2020-12-29 | 1.20 ppb |
| 2020-12-29 | ND |
| 2020-12-29 | ND |
| 2021-03-30 | ND |
| 2021-06-30 | ND |
| 2021-12-29 | 1.50 ppb |
| 2021-12-29 | ND |
| 2021-12-29 | ND |
| 2021-12-29 | ND |
| 2022-03-30 | ND |
| 2022-06-29 | 1.30 ppb |
| 2022-09-13 | 2.10 ppb |
| 2022-12-16 | ND |
| 2022-12-16 | ND |
| 2022-12-16 | 1.90 ppb |
| 2022-12-16 | ND |
| 2023-03-29 | 1.80 ppb |
| 2023-06-29 | 2.00 ppb |
| 2023-09-20 | 1.80 ppb |
| 2023-12-27 | ND |
| 2023-12-27 | 2.10 ppb |
| 2023-12-27 | ND |
| 2023-12-27 | 1.90 ppb |