MTBE
Ashford Highlands Mutual Water Company
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.
8
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 | 1 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2018-08-13 | CA3500900_001_001-201808131134 | ND |
| 2019-05-20 | CA3500900_001_001-201905201000 | ND |
| 2020-12-21 | CA3500900_004_004-202012211100 | ND |
| 2021-03-22 | CA3500900_004_004-202103221030 | ND |
| 2021-06-21 | CA3500900_004_004-202106211130 | ND |
| 2021-09-08 | CA3500900_004_004-202109081130 | ND |
| 2021-12-06 | CA3500900_004_004-202112061100 | ND |
| 2023-06-05 | CA3500900_001_001-202306051140 | ND |