MTBE
Castroville Community Services 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.
7
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 | N/A | 0 | 0 | N/A |
| 2019 | ND | 4 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | ND | 3 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2019-01-28 | CA2710005_004_004-201901281055 | ND |
| 2019-01-28 | CA2710005_009_009-201901281045 | ND |
| 2019-01-28 | CA2710005_003_003-201901281035 | ND |
| 2019-01-28 | CA2710005_005_005-201901281050 | ND |
| 2022-01-10 | CA2710005_005_005-202201100955 | ND |
| 2022-01-10 | CA2710005_003_003-202201100900 | ND |
| 2022-01-10 | CA2710005_009_009-202201100905 | ND |