MTBE
Crawfordville 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.
10
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 | 1.60 ppb | 1 | 1 | 1.60 ppb |
| 2019 | 0.600 ppb | 3 | 1 | ND - 1.80 ppb |
| 2020 | ND | 1 | 0 | ND |
| 2021 | 2.20 ppb | 1 | 1 | 2.20 ppb |
| 2022 | 0.567 ppb | 3 | 1 | ND - 1.70 ppb |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2018-05-24 | AJ90171 | 1.60 ppb |
| 2019-05-16 | AK17725 | 1.80 ppb |
| 2019-05-16 | AK17726 | ND |
| 2019-05-16 | AK17727 | ND |
| 2020-06-04 | AK47378 | ND |
| 2021-03-25 | AK71829 | 2.20 ppb |
| 2022-04-07 | AK98570 | 1.70 ppb |
| 2022-12-20 | AL22779 | ND |
| 2022-12-28 | AL23053 | ND |
| 2023-01-30 | AL24270 | ND |